diff --git a/src/plugins/qmldesigner/CMakeLists.txt b/src/plugins/qmldesigner/CMakeLists.txt
index d08027197be..41e70cb1e95 100644
--- a/src/plugins/qmldesigner/CMakeLists.txt
+++ b/src/plugins/qmldesigner/CMakeLists.txt
@@ -300,6 +300,12 @@ extend_qtc_plugin(QmlDesigner
 extend_qtc_plugin(QmlDesigner
   SOURCES_PREFIX components/itemlibrary
   SOURCES
+    assetimportupdatedialog.cpp assetimportupdatedialog.h
+    assetimportupdatedialog.ui
+    assetimportupdatetreeitem.cpp assetimportupdatetreeitem.h
+    assetimportupdatetreeitemdelegate.cpp assetimportupdatetreeitemdelegate.h
+    assetimportupdatetreemodel.cpp assetimportupdatetreemodel.h
+    assetimportupdatetreeview.cpp assetimportupdatetreeview.h
     customfilesystemmodel.cpp customfilesystemmodel.h
     itemlibrary.qrc
     itemlibraryimageprovider.cpp itemlibraryimageprovider.h
diff --git a/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatedialog.cpp b/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatedialog.cpp
new file mode 100644
index 00000000000..bc420dc6385
--- /dev/null
+++ b/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatedialog.cpp
@@ -0,0 +1,94 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+#include "assetimportupdatedialog.h"
+#include "ui_assetimportupdatedialog.h"
+#include "assetimportupdatetreeview.h"
+#include "assetimportupdatetreemodel.h"
+
+#include <QDirIterator>
+#include <QPushButton>
+#include <QTreeView>
+#include <QFileInfo>
+#include <QModelIndex>
+
+namespace QmlDesigner {
+namespace Internal {
+
+AssetImportUpdateDialog::AssetImportUpdateDialog(
+        const QString &importPath, const QSet<QString> &preSelectedFiles,
+        const QSet<QString> &hiddenEntries, QWidget *parent)
+    : QDialog(parent)
+    , ui(new Ui::AssetImportUpdateDialog)
+{
+    setModal(true);
+    ui->setupUi(this);
+
+    connect(ui->buttonBox->button(QDialogButtonBox::Ok), &QPushButton::clicked,
+            this, &AssetImportUpdateDialog::accept);
+    connect(ui->buttonBox->button(QDialogButtonBox::Cancel), &QPushButton::clicked,
+            this, &AssetImportUpdateDialog::reject);
+    connect(ui->expandButton, &QPushButton::clicked,
+            this, &AssetImportUpdateDialog::expandAll);
+    connect(ui->collapseButton, &QPushButton::clicked,
+            this, &AssetImportUpdateDialog::collapseAll);
+    ui->buttonBox->button(QDialogButtonBox::Ok)->setDefault(true);
+
+    QList<QFileInfo> infos;
+    infos.append(QFileInfo{importPath});
+    QDirIterator it(importPath, {"*"}, QDir::Files | QDir::Dirs | QDir::NoDotAndDotDot,
+                    QDirIterator::Subdirectories);
+    while (it.hasNext()) {
+        it.next();
+        const QString absFile = it.fileInfo().absoluteFilePath();
+        if (!hiddenEntries.contains(absFile))
+            infos.append(it.fileInfo());
+    }
+
+    ui->treeView->model()->createItems(infos, preSelectedFiles);
+    ui->treeView->expandAll();
+}
+
+AssetImportUpdateDialog::~AssetImportUpdateDialog()
+{
+    delete ui;
+}
+
+QStringList AssetImportUpdateDialog::selectedFiles() const
+{
+    return ui->treeView->model()->checkedFiles();
+}
+
+void AssetImportUpdateDialog::collapseAll()
+{
+    ui->treeView->collapseAll();
+}
+
+void AssetImportUpdateDialog::expandAll()
+{
+    ui->treeView->expandAll();
+}
+
+} // namespace Internal
+} // namespace QmlDesigner
diff --git a/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatedialog.h b/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatedialog.h
new file mode 100644
index 00000000000..497fc6ca384
--- /dev/null
+++ b/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatedialog.h
@@ -0,0 +1,59 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+#pragma once
+
+#include <QDialog>
+#include <QStringList>
+#include <QSet>
+
+namespace QmlDesigner {
+namespace Internal {
+
+namespace Ui {
+class AssetImportUpdateDialog;
+}
+
+class AssetImportUpdateDialog : public QDialog
+{
+    Q_OBJECT
+
+public:
+    explicit AssetImportUpdateDialog(const QString &importPath,
+                                     const QSet<QString> &preSelectedFiles,
+                                     const QSet<QString> &hiddenEntries,
+                                     QWidget *parent = nullptr);
+    ~AssetImportUpdateDialog();
+
+    QStringList selectedFiles() const;
+
+private:
+    void collapseAll();
+    void expandAll();
+
+    Ui::AssetImportUpdateDialog *ui = nullptr;
+};
+
+} // namespace Internal
+} // namespace QmlDesigner
diff --git a/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatedialog.ui b/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatedialog.ui
new file mode 100644
index 00000000000..576987e5de0
--- /dev/null
+++ b/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatedialog.ui
@@ -0,0 +1,77 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>QmlDesigner::Internal::AssetImportUpdateDialog</class>
+ <widget class="QDialog" name="QmlDesigner::Internal::AssetImportUpdateDialog">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>472</width>
+    <height>360</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Select Files to Update</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout_2">
+   <item>
+    <layout class="QVBoxLayout" name="verticalLayout">
+     <item>
+      <widget class="AssetImportUpdateTreeView" name="treeView">
+       <property name="selectionMode">
+        <enum>QAbstractItemView::NoSelection</enum>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <layout class="QHBoxLayout" name="horizontalLayout" stretch="0,0,0,0">
+       <item>
+        <widget class="QPushButton" name="expandButton">
+         <property name="text">
+          <string>Expand All</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QPushButton" name="collapseButton">
+         <property name="text">
+          <string>Collapse All</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <spacer name="horizontalSpacer">
+         <property name="orientation">
+          <enum>Qt::Horizontal</enum>
+         </property>
+         <property name="sizeHint" stdset="0">
+          <size>
+           <width>77</width>
+           <height>20</height>
+          </size>
+         </property>
+        </spacer>
+       </item>
+       <item>
+        <widget class="QDialogButtonBox" name="buttonBox">
+         <property name="standardButtons">
+          <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </item>
+    </layout>
+   </item>
+  </layout>
+ </widget>
+ <customwidgets>
+  <customwidget>
+   <class>AssetImportUpdateTreeView</class>
+   <extends>QTreeView</extends>
+   <header>assetimportupdatetreeview.h</header>
+  </customwidget>
+ </customwidgets>
+ <resources/>
+ <connections/>
+</ui>
diff --git a/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatetreeitem.cpp b/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatetreeitem.cpp
new file mode 100644
index 00000000000..81f5a143924
--- /dev/null
+++ b/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatetreeitem.cpp
@@ -0,0 +1,87 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include "assetimportupdatetreeitem.h"
+
+namespace QmlDesigner {
+namespace Internal {
+
+AssetImportUpdateTreeItem::AssetImportUpdateTreeItem(const QFileInfo &info,
+                                                     AssetImportUpdateTreeItem *parent)
+  : m_parent(parent)
+  , m_fileInfo(info)
+{
+    if (parent)
+        parent->appendChild(this);
+}
+
+AssetImportUpdateTreeItem::~AssetImportUpdateTreeItem()
+{
+    if (m_parent)
+        m_parent->removeChild(this);
+    clear();
+}
+
+void AssetImportUpdateTreeItem::clear()
+{
+    qDeleteAll(m_children);
+    m_children.clear();
+    m_fileInfo = {};
+    m_parent = nullptr;
+}
+
+int AssetImportUpdateTreeItem::childCount() const
+{
+    return m_children.count();
+}
+
+int AssetImportUpdateTreeItem::rowOfItem() const
+{
+    return m_parent ? m_parent->m_children.indexOf(const_cast<AssetImportUpdateTreeItem *>(this))
+                    : 0;
+}
+
+AssetImportUpdateTreeItem *AssetImportUpdateTreeItem::childAt(int index) const
+{
+    return m_children.at(index);
+}
+
+AssetImportUpdateTreeItem *AssetImportUpdateTreeItem::parent() const
+{
+    return m_parent;
+}
+
+void AssetImportUpdateTreeItem::removeChild(AssetImportUpdateTreeItem *item)
+{
+    m_children.removeOne(item);
+}
+
+void AssetImportUpdateTreeItem::appendChild(AssetImportUpdateTreeItem *item)
+{
+    m_children.append(item);
+}
+
+} // namespace Internal
+} // namespace QmlDesigner
diff --git a/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatetreeitem.h b/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatetreeitem.h
new file mode 100644
index 00000000000..ef944e2dece
--- /dev/null
+++ b/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatetreeitem.h
@@ -0,0 +1,65 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include <QString>
+#include <QList>
+#include <QFileInfo>
+
+namespace QmlDesigner {
+namespace Internal {
+
+class AssetImportUpdateTreeItem
+{
+public:
+    explicit AssetImportUpdateTreeItem(const QFileInfo &info,
+                                       AssetImportUpdateTreeItem *parent = nullptr);
+    virtual ~AssetImportUpdateTreeItem();
+
+    AssetImportUpdateTreeItem *parent() const;
+    AssetImportUpdateTreeItem *childAt(int index) const;
+    int childCount() const;
+    int rowOfItem() const;
+    void clear();
+
+    Qt::CheckState checkState() const { return m_checkState; }
+    void setCheckState(Qt::CheckState checkState) { m_checkState = checkState; }
+    const QFileInfo &fileInfo() const { return m_fileInfo; }
+    void setFileInfo(const QFileInfo &info) { m_fileInfo = info; }
+    void removeChild(AssetImportUpdateTreeItem *item);
+    const QList<AssetImportUpdateTreeItem *> &children() const { return m_children; }
+
+private:
+    void appendChild(AssetImportUpdateTreeItem *item);
+
+    AssetImportUpdateTreeItem *m_parent;
+    QList<AssetImportUpdateTreeItem *> m_children;
+    Qt::CheckState m_checkState = Qt::Unchecked;
+    QFileInfo m_fileInfo;
+};
+
+} // namespace Internal
+} // namespace QmlDesigner
diff --git a/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatetreeitemdelegate.cpp b/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatetreeitemdelegate.cpp
new file mode 100644
index 00000000000..9a517f76b24
--- /dev/null
+++ b/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatetreeitemdelegate.cpp
@@ -0,0 +1,101 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include "assetimportupdatetreeitemdelegate.h"
+#include "assetimportupdatetreemodel.h"
+
+#include <QPainter>
+#include <QModelIndex>
+
+namespace QmlDesigner {
+namespace Internal {
+
+AssetImportUpdateTreeItemDelegate::AssetImportUpdateTreeItemDelegate(QObject *parent)
+    : QItemDelegate(parent)
+{
+}
+
+AssetImportUpdateTreeItemDelegate::LayoutInfo AssetImportUpdateTreeItemDelegate::getLayoutInfo(
+        const QStyleOptionViewItem &option, const QModelIndex &index) const
+{
+    LayoutInfo info;
+    info.option = setOptions(index, option);
+
+    const bool checkable = (index.model()->flags(index) & Qt::ItemIsUserCheckable);
+    info.checkState = Qt::Unchecked;
+    if (checkable) {
+        QVariant checkStateData = index.data(Qt::CheckStateRole);
+        info.checkState = static_cast<Qt::CheckState>(checkStateData.toInt());
+        info.checkRect = doCheck(info.option, info.option.rect, checkStateData);
+    }
+
+    info.textRect = info.option.rect.adjusted(0, 0, info.checkRect.width(), 0);
+
+    doLayout(info.option, &info.checkRect, &info.iconRect, &info.textRect, false);
+
+    return info;
+}
+
+void AssetImportUpdateTreeItemDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
+                                              const QModelIndex &index) const
+{
+    painter->save();
+
+    const LayoutInfo info = getLayoutInfo(option, index);
+
+    painter->setFont(info.option.font);
+
+    drawBackground(painter, info.option, index);
+    drawText(painter, info.option, info.textRect, index);
+    drawCheck(painter, info.option, info.checkRect, info.checkState);
+
+    painter->restore();
+}
+
+QSize AssetImportUpdateTreeItemDelegate::sizeHint(const QStyleOptionViewItem &option,
+                                                  const QModelIndex &index) const
+{
+    const LayoutInfo info = getLayoutInfo(option, index);
+    const int height = index.data(Qt::SizeHintRole).value<QSize>().height();
+    // get text width, see QItemDelegatePrivate::displayRect
+    const QString text = index.data(Qt::DisplayRole).toString();
+    const QRect textMaxRect(0, 0, INT_MAX / 256, height);
+    const QRect textLayoutRect = textRectangle(nullptr, textMaxRect, info.option.font, text);
+    const QRect textRect(info.textRect.x(), info.textRect.y(), textLayoutRect.width(), height);
+    const QRect layoutRect = info.checkRect | textRect;
+    return QSize(layoutRect.x(), layoutRect.y()) + layoutRect.size();
+}
+
+void AssetImportUpdateTreeItemDelegate::drawText(QPainter *painter,
+                                                 const QStyleOptionViewItem &option,
+                                                 const QRect &rect,
+                                                 const QModelIndex &index) const
+{
+    const QString text = index.data(Qt::DisplayRole).toString();
+    drawDisplay(painter, option, rect, text);
+}
+
+} // namespace Internal
+} // namespace QmlDesigner
diff --git a/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatetreeitemdelegate.h b/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatetreeitemdelegate.h
new file mode 100644
index 00000000000..a066ebcfb41
--- /dev/null
+++ b/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatetreeitemdelegate.h
@@ -0,0 +1,57 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include <QItemDelegate>
+#include <QStyleOptionViewItem>
+
+namespace QmlDesigner {
+namespace Internal {
+
+class AssetImportUpdateTreeItemDelegate : public QItemDelegate
+{
+public:
+    AssetImportUpdateTreeItemDelegate(QObject *parent = nullptr);
+    void paint(QPainter *painter, const QStyleOptionViewItem &option,
+               const QModelIndex &index) const override;
+    QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const override;
+private:
+    struct LayoutInfo
+    {
+        QRect checkRect;
+        QRect textRect;
+        QRect iconRect;
+        Qt::CheckState checkState;
+        QStyleOptionViewItem option;
+    };
+
+    LayoutInfo getLayoutInfo(const QStyleOptionViewItem &option, const QModelIndex &index) const;
+    void drawText(QPainter *painter, const QStyleOptionViewItem &option,
+                  const QRect &rect, const QModelIndex &index) const;
+};
+
+} // namespace Internal
+} // namespace QmlDesigner
diff --git a/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatetreemodel.cpp b/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatetreemodel.cpp
new file mode 100644
index 00000000000..fac0797d5ed
--- /dev/null
+++ b/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatetreemodel.cpp
@@ -0,0 +1,262 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include "assetimportupdatetreemodel.h"
+#include "assetimportupdatetreeitem.h"
+
+#include <QSize>
+
+namespace QmlDesigner {
+namespace Internal {
+
+AssetImportUpdateTreeModel::AssetImportUpdateTreeModel(QObject *parent)
+    : QAbstractItemModel(parent)
+{
+    m_rootItem = new AssetImportUpdateTreeItem {{}};
+}
+
+AssetImportUpdateTreeModel::~AssetImportUpdateTreeModel()
+{
+    delete m_rootItem;
+}
+
+Qt::ItemFlags AssetImportUpdateTreeModel::flags(const QModelIndex &idx) const
+{
+    Qt::ItemFlags flags = QAbstractItemModel::flags(idx);
+
+    if (idx.isValid())
+        flags |= Qt::ItemIsUserCheckable;
+
+    return flags;
+}
+
+QModelIndex AssetImportUpdateTreeModel::index(int row, int column,
+                                              const QModelIndex &parent) const
+{
+    if (!hasIndex(row, column, parent))
+        return QModelIndex();
+
+    const AssetImportUpdateTreeItem *parentItem;
+
+    parentItem = parent.isValid() ? treeItemAtIndex(parent) : m_rootItem;
+
+    const AssetImportUpdateTreeItem *childItem = parentItem->childAt(row);
+    if (childItem)
+        return createIndex(row, column, const_cast<AssetImportUpdateTreeItem *>(childItem));
+    else
+        return QModelIndex();
+}
+
+QModelIndex AssetImportUpdateTreeModel::index(AssetImportUpdateTreeItem *item) const
+{
+    return createIndex(item->rowOfItem(), 0, item);
+}
+
+QVariant AssetImportUpdateTreeModel::data(const AssetImportUpdateTreeItem *row, int role) const
+{
+    if (role == Qt::DisplayRole)
+        return row->fileInfo().fileName();
+    if (role == Qt::CheckStateRole)
+        return row->checkState();
+    if (role == Qt::ToolTipRole)
+        return row->fileInfo().absoluteFilePath();
+    return {};
+}
+
+QModelIndex AssetImportUpdateTreeModel::parent(const QModelIndex &idx) const
+{
+    if (!idx.isValid())
+        return QModelIndex();
+
+    const AssetImportUpdateTreeItem *childItem = treeItemAtIndex(idx);
+    const AssetImportUpdateTreeItem *parentItem = childItem->parent();
+
+    if (parentItem == m_rootItem)
+        return QModelIndex();
+
+    return createIndex(parentItem->rowOfItem(), 0, const_cast<AssetImportUpdateTreeItem *>(parentItem));
+}
+
+int AssetImportUpdateTreeModel::rowCount(const QModelIndex &parent) const
+{
+    if (parent.column() > 0)
+        return 0;
+
+    return parent.isValid() ? treeItemAtIndex(parent)->childCount()
+                            : m_rootItem->childCount();
+}
+
+int AssetImportUpdateTreeModel::columnCount(const QModelIndex &) const
+{
+    return 1;
+}
+
+AssetImportUpdateTreeItem *AssetImportUpdateTreeModel::treeItemAtIndex(const QModelIndex &idx)
+{
+    return static_cast<AssetImportUpdateTreeItem*>(idx.internalPointer());
+}
+
+QVariant AssetImportUpdateTreeModel::data(const QModelIndex &idx, int role) const
+{
+    if (!idx.isValid())
+        return {};
+
+    if (role == Qt::SizeHintRole)
+        return QSize(0, 20);
+
+    return data(treeItemAtIndex(idx), role);
+}
+
+bool AssetImportUpdateTreeModel::setData(const QModelIndex &idx, const QVariant &value, int role)
+{
+    if (role == Qt::CheckStateRole) {
+        auto checkState = static_cast<Qt::CheckState>(value.toInt());
+        return setCheckState(idx, checkState);
+    }
+    return QAbstractItemModel::setData(idx, value, role);
+}
+
+bool AssetImportUpdateTreeModel::setCheckState(const QModelIndex &idx, Qt::CheckState checkState,
+                                               bool firstCall)
+{
+    AssetImportUpdateTreeItem *item = treeItemAtIndex(idx);
+    if (item->checkState() == checkState)
+        return false;
+    item->setCheckState(checkState);
+    if (firstCall) {
+        emit dataChanged(idx, idx);
+        // check parents
+        AssetImportUpdateTreeItem *parent = item->parent();
+        QModelIndex parentIdx = idx.parent();
+        while (parent) {
+            bool hasChecked = false;
+            bool hasUnchecked = false;
+            for (const auto child : parent->children()) {
+                if (child->checkState() == Qt::Checked) {
+                    hasChecked = true;
+                } else if (child->checkState() == Qt::Unchecked) {
+                    hasUnchecked = true;
+                } else if (child->checkState() == Qt::PartiallyChecked) {
+                    hasChecked = true;
+                    hasUnchecked = true;
+                }
+            }
+            if (hasChecked && hasUnchecked)
+                parent->setCheckState(Qt::PartiallyChecked);
+            else if (hasChecked)
+                parent->setCheckState(Qt::Checked);
+            else
+                parent->setCheckState(Qt::Unchecked);
+            emit dataChanged(parentIdx, parentIdx);
+            parent = parent->parent();
+            parentIdx = parentIdx.parent();
+        }
+    }
+    // check children
+    if (int children = item->childCount()) {
+        for (int i = 0; i < children; ++i)
+            setCheckState(index(i, 0, idx), checkState, false);
+        emit dataChanged(index(0, 0, idx), index(children - 1, 0, idx));
+    }
+    return true;
+}
+
+void AssetImportUpdateTreeModel::createItems(const QList<QFileInfo> &infos,
+                                             const QSet<QString> &preselectedFiles)
+{
+    beginResetModel();
+    if (!infos.isEmpty()) {
+        QHash<QString, AssetImportUpdateTreeItem *> dirItems;
+        for (const auto &info : infos) {
+            auto parent = dirItems.value(info.absolutePath());
+            if (!parent)
+                parent = m_rootItem;
+            auto item = new AssetImportUpdateTreeItem(info, parent);
+            if (info.isDir()) {
+                dirItems.insert(info.absoluteFilePath(), item);
+            } else {
+                m_fileItems.append(item);
+                if (preselectedFiles.contains(info.absoluteFilePath()))
+                    item->setCheckState(Qt::Checked);
+            }
+        }
+        // Remove dir items that have no children from the model
+        for (auto dirItem : qAsConst(dirItems)) {
+            if (dirItem->childCount() == 0)
+                delete dirItem;
+        }
+        std::function<Qt::CheckState (AssetImportUpdateTreeItem *)> updateDirCheckStatesRecursive;
+        updateDirCheckStatesRecursive = [&](AssetImportUpdateTreeItem *item) -> Qt::CheckState {
+            bool hasChecked = false;
+            bool hasUnchecked = false;
+            for (const auto child : item->children()) {
+                Qt::CheckState childState = child->childCount() > 0
+                        ? updateDirCheckStatesRecursive(child)
+                        : child->checkState();
+                if (childState == Qt::Checked) {
+                    hasChecked = true;
+                } else if (childState == Qt::Unchecked) {
+                    hasUnchecked = true;
+                } else {
+                    hasChecked = true;
+                    hasUnchecked = true;
+                    break;
+                }
+            }
+            Qt::CheckState retval = Qt::Unchecked;
+            if (hasChecked && hasUnchecked)
+                retval = Qt::PartiallyChecked;
+            else if (hasChecked)
+                retval = Qt::Checked;
+            item->setCheckState(retval);
+            return retval;
+        };
+        m_rootItem->setCheckState(updateDirCheckStatesRecursive(m_rootItem));
+    }
+    endResetModel();
+}
+
+QStringList AssetImportUpdateTreeModel::checkedFiles() const
+{
+    QStringList retList;
+
+    for (const auto item : qAsConst(m_fileItems)) {
+        if (item->checkState() == Qt::Checked)
+            retList.append(item->fileInfo().absoluteFilePath());
+    }
+
+    return retList;
+}
+
+void AssetImportUpdateTreeModel::clear()
+{
+    beginResetModel();
+    m_fileItems.clear();
+    m_rootItem->clear(); // Deletes all children
+    endResetModel();
+}
+
+} // namespace Internal
+} // namespace QmlDesigner
diff --git a/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatetreemodel.h b/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatetreemodel.h
new file mode 100644
index 00000000000..adba52f0379
--- /dev/null
+++ b/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatetreemodel.h
@@ -0,0 +1,73 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include <QAbstractItemModel>
+#include <QFileInfo>
+#include <QList>
+#include <QSet>
+#include <QStringList>
+
+namespace QmlDesigner {
+namespace Internal {
+
+class AssetImportUpdateTreeItem;
+
+class AssetImportUpdateTreeModel : public QAbstractItemModel
+{
+    Q_OBJECT
+
+public:
+    AssetImportUpdateTreeModel(QObject *parent = nullptr);
+    ~AssetImportUpdateTreeModel() override;
+
+    Qt::ItemFlags flags(const QModelIndex &index) const override;
+    QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const override;
+    QModelIndex parent(const QModelIndex &child) const override;
+    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
+    int columnCount(const QModelIndex &parent = QModelIndex()) const override;
+    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
+    bool setData(const QModelIndex &index, const QVariant &value, int role = Qt::EditRole) override;
+
+    void createItems(const QList<QFileInfo> &infos, const QSet<QString> &preselectedFiles);
+    QStringList checkedFiles() const;
+
+    static AssetImportUpdateTreeItem *treeItemAtIndex(const QModelIndex &idx);
+
+public slots:
+    void clear();
+
+private:
+    QModelIndex index(AssetImportUpdateTreeItem *item) const;
+    QVariant data(const AssetImportUpdateTreeItem *row, int role) const;
+    bool setCheckState(const QModelIndex &idx, Qt::CheckState checkState, bool firstCall = true);
+
+    AssetImportUpdateTreeItem *m_rootItem;
+    QList<AssetImportUpdateTreeItem *> m_fileItems;
+};
+
+} // namespace Internal
+} // namespace QmlDesigner
diff --git a/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatetreeview.cpp b/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatetreeview.cpp
new file mode 100644
index 00000000000..87e9fc1c803
--- /dev/null
+++ b/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatetreeview.cpp
@@ -0,0 +1,57 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include "assetimportupdatetreeview.h"
+#include "assetimportupdatetreemodel.h"
+#include "assetimportupdatetreeitemdelegate.h"
+
+#include <QHeaderView>
+
+namespace QmlDesigner {
+namespace Internal {
+
+AssetImportUpdateTreeView::AssetImportUpdateTreeView(QWidget *parent)
+    : Utils::TreeView(parent)
+    , m_model(new AssetImportUpdateTreeModel(this))
+{
+    setModel(m_model);
+    setItemDelegate(new AssetImportUpdateTreeItemDelegate(this));
+    setUniformRowHeights(true);
+    setExpandsOnDoubleClick(true);
+    header()->hide();
+}
+
+void AssetImportUpdateTreeView::clear()
+{
+    m_model->clear();
+}
+
+AssetImportUpdateTreeModel *AssetImportUpdateTreeView::model() const
+{
+    return m_model;
+}
+
+} // namespace Internal
+} // namespace QmlDesigner
diff --git a/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatetreeview.h b/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatetreeview.h
new file mode 100644
index 00000000000..3c5e040cfaf
--- /dev/null
+++ b/src/plugins/qmldesigner/components/itemlibrary/assetimportupdatetreeview.h
@@ -0,0 +1,54 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include "assetimportupdatetreeitem.h"
+
+#include <utils/itemviews.h>
+
+namespace QmlDesigner {
+namespace Internal {
+
+class AssetImportUpdateTreeModel;
+
+class AssetImportUpdateTreeView : public Utils::TreeView
+{
+    Q_OBJECT
+
+public:
+    explicit AssetImportUpdateTreeView(QWidget *parent = nullptr);
+
+    AssetImportUpdateTreeModel *model() const;
+
+public slots:
+    void clear();
+
+protected:
+    AssetImportUpdateTreeModel *m_model;
+};
+
+} // namespace Internal
+} // namespace QmlDesigner
diff --git a/src/plugins/qmldesigner/components/itemlibrary/itemlibrary.pri b/src/plugins/qmldesigner/components/itemlibrary/itemlibrary.pri
index 3f05f1ab0b1..8099c878536 100644
--- a/src/plugins/qmldesigner/components/itemlibrary/itemlibrary.pri
+++ b/src/plugins/qmldesigner/components/itemlibrary/itemlibrary.pri
@@ -15,7 +15,12 @@ HEADERS += itemlibraryview.h \
            itemlibraryaddimportmodel.h \
            itemlibraryassetimportdialog.h \
            itemlibraryassetimporter.h \
-           customfilesystemmodel.h
+           customfilesystemmodel.h \
+           assetimportupdatedialog.h \
+           assetimportupdatetreeitem.h \
+           assetimportupdatetreeitemdelegate.h \
+           assetimportupdatetreemodel.h \
+           assetimportupdatetreeview.h
 
 SOURCES += itemlibraryview.cpp \
            $$PWD/itemlibraryiconimageprovider.cpp \
@@ -31,7 +36,13 @@ SOURCES += itemlibraryview.cpp \
            itemlibraryaddimportmodel.cpp \
            itemlibraryassetimportdialog.cpp \
            itemlibraryassetimporter.cpp \
-           customfilesystemmodel.cpp
+           customfilesystemmodel.cpp \
+           assetimportupdatedialog.cpp \
+           assetimportupdatetreeitem.cpp \
+           assetimportupdatetreeitemdelegate.cpp \
+           assetimportupdatetreemodel.cpp \
+           assetimportupdatetreeview.cpp
 RESOURCES += itemlibrary.qrc
 
-FORMS += itemlibraryassetimportdialog.ui
+FORMS += itemlibraryassetimportdialog.ui \
+         assetimportupdatedialog.ui
diff --git a/src/plugins/qmldesigner/components/itemlibrary/itemlibraryassetimporter.cpp b/src/plugins/qmldesigner/components/itemlibrary/itemlibraryassetimporter.cpp
index 847be2c5f25..69924f20080 100644
--- a/src/plugins/qmldesigner/components/itemlibrary/itemlibraryassetimporter.cpp
+++ b/src/plugins/qmldesigner/components/itemlibrary/itemlibraryassetimporter.cpp
@@ -23,6 +23,7 @@
 **
 ****************************************************************************/
 #include "itemlibraryassetimporter.h"
+#include "assetimportupdatedialog.h"
 #include "qmldesignerplugin.h"
 #include "qmldesignerconstants.h"
 
@@ -41,6 +42,7 @@
 #include <QApplication>
 #include <QMessageBox>
 #include <QJsonDocument>
+#include <QPushButton>
 
 namespace
 {
@@ -262,11 +264,43 @@ bool ItemLibraryAssetImporter::preParseQuick3DAsset(const QString &file, ParseDa
             pd.assetName = assetDirs[0];
             pd.targetDirPath = pd.targetDir.filePath(pd.assetName);
         }
-        if (!confirmAssetOverwrite(pd.assetName)) {
+        OverwriteResult result = confirmAssetOverwrite(pd.assetName);
+        if (result == OverwriteResult::Skip) {
             addWarning(tr("Skipped import of existing asset: \"%1\"").arg(pd.assetName));
             return false;
+        } else if (result == OverwriteResult::Update) {
+            // Add generated icons and existing source asset file, as those will always need
+            // to be overwritten
+            QSet<QString> alwaysOverwrite;
+            QString iconPath = pd.targetDirPath + '/' + Constants::QUICK_3D_ASSET_ICON_DIR;
+            // Note: Despite the name, QUICK_3D_ASSET_LIBRARY_ICON_SUFFIX is not a traditional file
+            // suffix. It's guaranteed to be in the generated icon filename, though.
+            QStringList filters {QStringLiteral("*%1*").arg(Constants::QUICK_3D_ASSET_LIBRARY_ICON_SUFFIX)};
+            QDirIterator iconIt(iconPath, filters, QDir::Files);
+            while (iconIt.hasNext()) {
+                iconIt.next();
+                alwaysOverwrite.insert(iconIt.fileInfo().absoluteFilePath());
+            }
+            alwaysOverwrite.insert(sourceSceneTargetFilePath(pd));
+
+            Internal::AssetImportUpdateDialog dlg {pd.targetDirPath, {}, alwaysOverwrite,
+                                                   qobject_cast<QWidget *>(parent())};
+            int exitVal = dlg.exec();
+
+            QStringList overwriteFiles;
+            if (exitVal == QDialog::Accepted)
+                overwriteFiles = dlg.selectedFiles();
+            if (!overwriteFiles.isEmpty()) {
+                overwriteFiles.append(QStringList::fromSet(alwaysOverwrite));
+                m_overwrittenImports.insert(pd.targetDirPath, overwriteFiles);
+            } else {
+                addWarning(tr("No files selected for overwrite, skipping import: \"%1\"").arg(pd.assetName));
+                return false;
+            }
+
+        } else {
+            m_overwrittenImports.insert(pd.targetDirPath, {});
         }
-        m_overwrittenImports << pd.targetDirPath;
     }
 
     pd.outDir.mkpath(pd.assetName);
@@ -395,8 +429,7 @@ void ItemLibraryAssetImporter::postParseQuick3DAsset(const ParseData &pd)
     }
 
     // Copy the original asset into a subdirectory
-    assetFiles.insert(pd.sourceInfo.absoluteFilePath(),
-                      pd.targetDirPath + QStringLiteral("/source scene/") + pd.sourceInfo.fileName());
+    assetFiles.insert(pd.sourceInfo.absoluteFilePath(), sourceSceneTargetFilePath(pd));
     m_importFiles.insert(assetFiles);
 }
 
@@ -408,11 +441,22 @@ void ItemLibraryAssetImporter::copyImportedFiles()
         notifyProgress(0, progressTitle);
 
         int counter = 0;
-        for (const QString &dirPath : qAsConst(m_overwrittenImports)) {
-            QDir dir(dirPath);
-            if (dir.exists())
-                dir.removeRecursively();
+        auto it = m_overwrittenImports.constBegin();
+        while (it != m_overwrittenImports.constEnd()) {
+            QDir dir(it.key());
+            if (dir.exists()) {
+                const auto &overwrittenFiles = it.value();
+                if (overwrittenFiles.isEmpty()) {
+                    // Overwrite entire import
+                    dir.removeRecursively();
+                } else {
+                    // Overwrite just selected files
+                    for (const auto &fileName : overwrittenFiles)
+                        QFile::remove(fileName);
+                }
+            }
             notifyProgress((100 * ++counter) / m_overwrittenImports.size(), progressTitle);
+            ++it;
         }
     }
 
@@ -430,7 +474,7 @@ void ItemLibraryAssetImporter::copyImportedFiles()
             // by filesystem watchers.
             QHash<QString, QString>::const_iterator it = assetFiles.begin();
             while (it != assetFiles.end()) {
-                if (QFileInfo::exists(it.key())) {
+                if (QFileInfo::exists(it.key()) && !QFileInfo::exists(it.value())) {
                     QDir targetDir = QFileInfo(it.value()).dir();
                     if (!targetDir.exists())
                         targetDir.mkpath(".");
@@ -461,13 +505,26 @@ void ItemLibraryAssetImporter::keepUiAlive() const
     QApplication::processEvents();
 }
 
-bool ItemLibraryAssetImporter::confirmAssetOverwrite(const QString &assetName)
+ItemLibraryAssetImporter::OverwriteResult ItemLibraryAssetImporter::confirmAssetOverwrite(const QString &assetName)
 {
     const QString title = tr("Overwrite Existing Asset?");
-    const QString question = tr("Asset already exists. Overwrite?\n\"%1\"").arg(assetName);
-    return QMessageBox::question(qobject_cast<QWidget *>(parent()),
-                                 title, question,
-                                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes;
+    const QString question = tr("Asset already exists. Overwrite existing or skip?\n\"%1\"").arg(assetName);
+
+    QMessageBox msgBox {QMessageBox::Question, title, question, QMessageBox::NoButton,
+                        qobject_cast<QWidget *>(parent())};
+    QPushButton *updateButton = msgBox.addButton(tr("Overwrite Selected Files"), QMessageBox::NoRole);
+    QPushButton *overwriteButton = msgBox.addButton(tr("Overwrite All Files"), QMessageBox::NoRole);
+    QPushButton *skipButton = msgBox.addButton(tr("Skip"), QMessageBox::NoRole);
+    msgBox.setDefaultButton(overwriteButton);
+    msgBox.setEscapeButton(skipButton);
+
+    msgBox.exec();
+
+    if (msgBox.clickedButton() == updateButton)
+        return OverwriteResult::Update;
+    else if (msgBox.clickedButton() == overwriteButton)
+        return OverwriteResult::Overwrite;
+    return OverwriteResult::Skip;
 }
 
 bool ItemLibraryAssetImporter::startImportProcess(const ParseData &pd)
@@ -623,6 +680,11 @@ void ItemLibraryAssetImporter::finalizeQuick3DImport()
     }
 }
 
+QString ItemLibraryAssetImporter::sourceSceneTargetFilePath(const ParseData &pd)
+{
+    return pd.targetDirPath + QStringLiteral("/source scene/") + pd.sourceInfo.fileName();
+}
+
 bool ItemLibraryAssetImporter::isCancelled() const
 {
     keepUiAlive();
diff --git a/src/plugins/qmldesigner/components/itemlibrary/itemlibraryassetimporter.h b/src/plugins/qmldesigner/components/itemlibrary/itemlibraryassetimporter.h
index 022859a8527..56bd8ec8f29 100644
--- a/src/plugins/qmldesigner/components/itemlibrary/itemlibraryassetimporter.h
+++ b/src/plugins/qmldesigner/components/itemlibrary/itemlibraryassetimporter.h
@@ -99,14 +99,22 @@ private:
     void notifyProgress(int value, const QString &text);
     void notifyProgress(int value);
     void keepUiAlive() const;
-    bool confirmAssetOverwrite(const QString &assetName);
+
+    enum class OverwriteResult {
+        Skip,
+        Overwrite,
+        Update
+    };
+
+    OverwriteResult confirmAssetOverwrite(const QString &assetName);
     bool startImportProcess(const ParseData &pd);
     bool startIconProcess(int size, const QString &iconFile, const QString &iconSource);
     void postImport();
     void finalizeQuick3DImport();
+    QString sourceSceneTargetFilePath(const ParseData &pd);
 
     QSet<QHash<QString, QString>> m_importFiles;
-    QSet<QString> m_overwrittenImports;
+    QHash<QString, QStringList> m_overwrittenImports;
     bool m_isImporting = false;
     bool m_cancelled = false;
     QString m_importPath;
diff --git a/src/plugins/qmldesigner/qmldesignerplugin.qbs b/src/plugins/qmldesigner/qmldesignerplugin.qbs
index 0011be7a786..bd6c94cbb62 100644
--- a/src/plugins/qmldesigner/qmldesignerplugin.qbs
+++ b/src/plugins/qmldesigner/qmldesignerplugin.qbs
@@ -603,6 +603,17 @@ Project {
                 "integration/stackedutilitypanelcontroller.h",
                 "integration/utilitypanelcontroller.cpp",
                 "integration/utilitypanelcontroller.h",
+                "itemlibrary/assetimportupdatedialog.cpp",
+                "itemlibrary/assetimportupdatedialog.h",
+                "itemlibrary/assetimportupdatedialog.ui",
+                "itemlibrary/assetimportupdatetreeitem.cpp",
+                "itemlibrary/assetimportupdatetreeitem.h",
+                "itemlibrary/assetimportupdatetreeitemdelegate.cpp",
+                "itemlibrary/assetimportupdatetreeitemdelegate.h",
+                "itemlibrary/assetimportupdatetreemodel.cpp",
+                "itemlibrary/assetimportupdatetreemodel.h",
+                "itemlibrary/assetimportupdatetreeview.cpp",
+                "itemlibrary/assetimportupdatetreeview.h",
                 "itemlibrary/itemlibrary.qrc",
                 "itemlibrary/itemlibraryaddimportmodel.cpp",
                 "itemlibrary/itemlibraryaddimportmodel.h",