MainWindow: Create a study file copy in current dire before update.

src/View/MainWindow.py

@@ -31,7 +31,7 @@ from platformdirs import user_cache_dir
 
 from Solver.AdisTS import AdisTS
 from Solver.Mage import Mage8
-from tools import logger_exception
+from tools import logger_exception, pamhyr_db_need_update
 
 from PyQt5 import QtGui
 from PyQt5.QtGui import (
@@ -1087,10 +1087,13 @@ class ApplicationWindow(QMainWindow, ListedSubWindow, WindowToolKit):
             dialog.setDirectory(os.path.dirname(self.conf.last_study))
 
             if dialog.exec_():
-                file_name = dialog.selectedFiles()
+                file_name = dialog.selectedFiles()[0]
+
+                if pamhyr_db_need_update(file_name, Study._version):
+                    shutil.copyfile(file_name, file_name + ".old")
 
                 def fn():
-                    self._tmp_study = Study.open(file_name[0])
+                    self._tmp_study = Study.open(file_name)
 
                 dlg = WaitingDialog(
                     payload_fn=fn,