Index: b/src/VBox/Frontends/VirtualBox/src/settings/global/UIGlobalSettingsExtension.cpp
===================================================================
--- a/src/VBox/Frontends/VirtualBox/src/settings/global/UIGlobalSettingsExtension.cpp
+++ b/src/VBox/Frontends/VirtualBox/src/settings/global/UIGlobalSettingsExtension.cpp
@@ -16,6 +16,7 @@
  */
 
 /* Qt includes: */
+#include <QApplication>
 #include <QHeaderView>
 #include <QMenu>
 #ifdef VBOX_WS_WIN
@@ -295,7 +296,7 @@ void UIGlobalSettingsExtension::sltAddPa
         extensions << QString("*.%1").arg(VBoxExtPackFileExts[i]);
     const QString strFilter = tr("Extension package files (%1)").arg(extensions.join(" "));
 
-    const QStringList fileNames = QIFileDialog::getOpenFileNames(strBaseFolder, strFilter, this, strTitle, 0, true, true);
+    const QStringList fileNames = QIFileDialog::getOpenFileNames(strBaseFolder, strFilter, QApplication::activeWindow(), strTitle, 0, true, true);
 
     QString strFilePath;
     if (!fileNames.isEmpty())
Index: b/src/VBox/Frontends/VirtualBox/src/widgets/UIFilePathSelector.cpp
===================================================================
--- a/src/VBox/Frontends/VirtualBox/src/widgets/UIFilePathSelector.cpp
+++ b/src/VBox/Frontends/VirtualBox/src/widgets/UIFilePathSelector.cpp
@@ -397,10 +397,10 @@ void UIFilePathSelector::selectPath()
     switch (m_enmMode)
     {
         case Mode_File_Open:
-            strSelPath = QIFileDialog::getOpenFileName(strInitDir, m_strFileDialogFilters, parentWidget(), m_strFileDialogTitle); break;
+            strSelPath = QIFileDialog::getOpenFileName(strInitDir, m_strFileDialogFilters, QApplication::activeWindow(), m_strFileDialogTitle); break;
         case Mode_File_Save:
         {
-            strSelPath = QIFileDialog::getSaveFileName(strInitDir, m_strFileDialogFilters, parentWidget(), m_strFileDialogTitle);
+            strSelPath = QIFileDialog::getSaveFileName(strInitDir, m_strFileDialogFilters, QApplication::activeWindow(), m_strFileDialogTitle);
             if (!strSelPath.isEmpty() && QFileInfo(strSelPath).suffix().isEmpty())
             {
                 if (m_strFileDialogDefaultSaveExtension.isEmpty())
@@ -411,7 +411,7 @@ void UIFilePathSelector::selectPath()
             break;
         }
         case Mode_Folder:
-            strSelPath = QIFileDialog::getExistingDirectory(strInitDir, parentWidget(), m_strFileDialogTitle); break;
+            strSelPath = QIFileDialog::getExistingDirectory(strInitDir, QApplication::activeWindow(), m_strFileDialogTitle); break;
     }
 
     /* Do nothing if nothing chosen: */