--- a/eric6/HexEdit/HexEditMainWindow.py	Mon Oct 05 19:51:55 2020 +0200
+++ b/eric6/HexEdit/HexEditMainWindow.py	Tue Oct 06 17:52:44 2020 +0200
@@ -1369,7 +1369,7 @@
             self.__preferencesChangedByLocalPreferencesDialog)
         dlg.show()
         dlg.showConfigurationPageByName("hexEditorPage")
-        dlg.exec_()
+        dlg.exec()
         QCoreApplication.processEvents()
         if dlg.result() == QDialog.Accepted:
             dlg.setPreferences()