Mainwindow: Minor change.

src/View/MainWindow.py

@@ -891,6 +891,9 @@ class ApplicationWindow(QMainWindow, ListedSubWindow, WindowToolKit):
         if self._study is None:
             return
 
+        if self._study.filename == "":
+            return
+
         dialog = QFileDialog(self)
         dialog.setFileMode(QFileDialog.FileMode.ExistingFile)
         dialog.setDefaultSuffix(".BIN")