diff --git a/qubesmanager/qube_manager.py b/qubesmanager/qube_manager.py
index 09b3d1b..bee3760 100644
--- a/qubesmanager/qube_manager.py
+++ b/qubesmanager/qube_manager.py
@@ -336,6 +336,8 @@ class VmManagerWindow(ui_qubemanager.Ui_VmManagerWindow, QtGui.QMainWindow):
         self.sort_by_column = "Type"
         self.sort_order = QtCore.Qt.AscendingOrder
 
+        self.backup_window = None
+
         self.vms_list = []
         self.vms_in_table = {}
 
@@ -1047,9 +1049,17 @@ class VmManagerWindow(ui_qubemanager.Ui_VmManagerWindow, QtGui.QMainWindow):
     # noinspection PyArgumentList
     @QtCore.pyqtSlot(name='on_action_backup_triggered')
     def action_backup_triggered(self):
-        backup_window = backup.BackupVMsWindow(self.qt_app, self.qubes_app,
-                                                self.dispatcher)
-        backup_window.show()
+        if not self.backup_window:
+            self.backup_window = backup.BackupVMsWindow(self.qt_app, self.qubes_app,
+                                                self.dispatcher, self)
+            self.backup_window.finished.connect(self._backup_finished)
+
+        self.backup_window.show()
+        self.backup_window.activateWindow()
+
+    def _backup_finished(self):
+        self.backup_window.deleteLater()
+        self.backup_window = None
 
     # noinspection PyArgumentList
     @QtCore.pyqtSlot(name='on_action_exit_triggered')