diff --git a/src/plugins/projectexplorer/project.cpp b/src/plugins/projectexplorer/project.cpp
index 9805e8c4c1d..b48f8d36dd6 100644
--- a/src/plugins/projectexplorer/project.cpp
+++ b/src/plugins/projectexplorer/project.cpp
@@ -714,7 +714,7 @@ Utils::MacroExpander *Project::macroExpander() const
     return &d->m_macroExpander;
 }
 
-ProjectImporter *Project::createProjectImporter() const
+ProjectImporter *Project::projectImporter() const
 {
     return nullptr;
 }
diff --git a/src/plugins/projectexplorer/project.h b/src/plugins/projectexplorer/project.h
index 78e8d9db68d..f7dbc037c75 100644
--- a/src/plugins/projectexplorer/project.h
+++ b/src/plugins/projectexplorer/project.h
@@ -130,7 +130,7 @@ public:
     virtual void configureAsExampleProject(const QSet<Core::Id> &platforms);
 
     virtual bool requiresTargetPanel() const;
-    virtual ProjectImporter *createProjectImporter() const;
+    virtual ProjectImporter *projectImporter() const;
 
     KitMatcher requiredKitMatcher() const;
     void setRequiredKitMatcher(const KitMatcher &matcher);
diff --git a/src/plugins/projectexplorer/projectexplorer.cpp b/src/plugins/projectexplorer/projectexplorer.cpp
index bb9d466d84f..2820174d616 100644
--- a/src/plugins/projectexplorer/projectexplorer.cpp
+++ b/src/plugins/projectexplorer/projectexplorer.cpp
@@ -388,6 +388,7 @@ ProjectExplorerPlugin::ProjectExplorerPlugin()
 
 ProjectExplorerPlugin::~ProjectExplorerPlugin()
 {
+    delete dd->m_proWindow; // Needs access to the kit manager.
     JsonWizardFactory::destroyAllFactories();
 
     // Force sequence of deletion:
@@ -513,7 +514,6 @@ bool ProjectExplorerPlugin::initialize(const QStringList &arguments, QString *er
     JsonWizardFactory::registerGeneratorFactory(new ScannerGeneratorFactory);
 
     dd->m_proWindow = new ProjectWindow;
-    addAutoReleasedObject(dd->m_proWindow);
 
     Context projecTreeContext(Constants::C_PROJECT_TREE);
 
diff --git a/src/plugins/projectexplorer/targetsettingspanel.cpp b/src/plugins/projectexplorer/targetsettingspanel.cpp
index a7e827ed529..0e14218fb79 100644
--- a/src/plugins/projectexplorer/targetsettingspanel.cpp
+++ b/src/plugins/projectexplorer/targetsettingspanel.cpp
@@ -132,7 +132,6 @@ TargetSetupPageWrapper::TargetSetupPageWrapper(Project *project)
     : m_project(project)
 {
     m_targetSetupPage = new TargetSetupPage(this);
-    m_targetSetupPage->setProjectImporter(project->createProjectImporter());
     m_targetSetupPage->setUseScrollArea(false);
     m_targetSetupPage->setProjectPath(project->projectFilePath().toString());
     m_targetSetupPage->setRequiredKitMatcher(project->requiredKitMatcher());
@@ -209,7 +208,7 @@ class TargetGroupItemPrivate : public QObject
 
 public:
     TargetGroupItemPrivate(TargetGroupItem *q, Project *project);
-    ~TargetGroupItemPrivate() { /*delete m_importer;*/ }
+    ~TargetGroupItemPrivate();
 
     void handleRemovedKit(Kit *kit);
     void handleAddedKit(Kit *kit);
@@ -224,8 +223,7 @@ public:
 
     TargetGroupItem *q;
     QString m_displayName;
-    QPointer<Project> m_project;
-    ProjectImporter *m_importer;
+    Project *m_project;
 
     QPointer<QWidget> m_noKitLabel;
     QPointer<QWidget> m_configurePage;
@@ -281,12 +279,13 @@ void TargetGroupItemPrivate::ensureWidget()
 
 void TargetGroupItemPrivate::importTarget(const Utils::FileName &path)
 {
-    if (!m_importer)
+    ProjectImporter *importer = m_project->projectImporter();
+    if (!importer)
         return;
 
     Target *target = nullptr;
     BuildConfiguration *bc = nullptr;
-    QList<BuildInfo *> toImport = m_importer->import(path, false);
+    QList<BuildInfo *> toImport = importer->import(path, false);
     foreach (BuildInfo *info, toImport) {
         target = m_project->target(info->kitId);
         if (!target) {
@@ -519,7 +518,7 @@ public:
     bool isEnabled() const { return target() != 0; }
 
 public:
-    Project *m_project; // Not owned.
+    QPointer<Project> m_project; // Not owned.
     Id m_kitId;
     int m_currentChild = 1; // Use run page by default.
 };
@@ -706,13 +705,10 @@ TargetGroupItem::~TargetGroupItem()
     delete d;
 }
 
-TargetGroupItemPrivate::TargetGroupItemPrivate(TargetGroupItem *q,
-                                                               Project *project)
+TargetGroupItemPrivate::TargetGroupItemPrivate(TargetGroupItem *q, Project *project)
     : q(q), m_project(project)
 {
-    m_importer = project->createProjectImporter();
-
-    if (m_importer) {
+    if (project->projectImporter()) {
         auto importAction = new QAction(tr("Import existing build..."), 0);
         QObject::connect(importAction, &QAction::triggered, [this] {
             QString dir = m_project->projectDirectory().toString();
@@ -730,6 +726,11 @@ TargetGroupItemPrivate::TargetGroupItemPrivate(TargetGroupItem *q,
     rebuildContents();
 }
 
+TargetGroupItemPrivate::~TargetGroupItemPrivate()
+{
+    disconnect();
+}
+
 QVariant TargetGroupItem::data(int column, int role) const
 {
     if (role == Qt::DisplayRole)
diff --git a/src/plugins/projectexplorer/targetsetuppage.cpp b/src/plugins/projectexplorer/targetsetuppage.cpp
index 9ee60436c57..fb9b5e3fd37 100644
--- a/src/plugins/projectexplorer/targetsetuppage.cpp
+++ b/src/plugins/projectexplorer/targetsetuppage.cpp
@@ -218,9 +218,9 @@ void TargetSetupPage::setPreferredKitMatcher(const KitMatcher &matcher)
 
 TargetSetupPage::~TargetSetupPage()
 {
+    disconnect();
     reset();
     delete m_ui;
-    delete m_importer;
 }
 
 bool TargetSetupPage::isKitSelected(Core::Id id) const
diff --git a/src/plugins/qmakeprojectmanager/qmakeproject.cpp b/src/plugins/qmakeprojectmanager/qmakeproject.cpp
index b896fc0a958..530250a05aa 100644
--- a/src/plugins/qmakeprojectmanager/qmakeproject.cpp
+++ b/src/plugins/qmakeprojectmanager/qmakeproject.cpp
@@ -298,6 +298,8 @@ QmakeProject::QmakeProject(QmakeManager *manager, const QString &fileName) :
 
 QmakeProject::~QmakeProject()
 {
+    delete m_projectImporter;
+    m_projectImporter = nullptr;
     m_codeModelFuture.cancel();
     m_asyncUpdateState = ShuttingDown;
 
@@ -1613,9 +1615,11 @@ void QmakeProject::emitBuildDirectoryInitialized()
     emit buildDirectoryInitialized();
 }
 
-ProjectImporter *QmakeProject::createProjectImporter() const
+ProjectImporter *QmakeProject::projectImporter() const
 {
-    return new QmakeProjectImporter(projectFilePath().toString());
+    if (!m_projectImporter)
+        m_projectImporter = new QmakeProjectImporter(projectFilePath().toString());
+    return m_projectImporter;
 }
 
 QmakeProject::AsyncUpdateState QmakeProject::asyncUpdateState() const
diff --git a/src/plugins/qmakeprojectmanager/qmakeproject.h b/src/plugins/qmakeprojectmanager/qmakeproject.h
index eb3e4328ec0..2816b6e5714 100644
--- a/src/plugins/qmakeprojectmanager/qmakeproject.h
+++ b/src/plugins/qmakeprojectmanager/qmakeproject.h
@@ -129,7 +129,7 @@ public:
     void emitBuildDirectoryInitialized();
     static void proFileParseError(const QString &errorMessage);
 
-    ProjectExplorer::ProjectImporter *createProjectImporter() const override;
+    ProjectExplorer::ProjectImporter *projectImporter() const override;
 
     enum AsyncUpdateState { Base, AsyncFullUpdatePending, AsyncPartialUpdatePending, AsyncUpdateInProgress, ShuttingDown };
     AsyncUpdateState asyncUpdateState() const;
@@ -203,6 +203,7 @@ private:
     Internal::CentralizedFolderWatcher *m_centralizedFolderWatcher = nullptr;
 
     ProjectExplorer::Target *m_activeTarget = nullptr;
+    mutable ProjectExplorer::ProjectImporter *m_projectImporter = nullptr;
 
     friend class Internal::QmakeProjectFile;
     friend class Internal::QmakeProjectConfigWidget;