diff --git a/base.py b/base.py
index 6e7bcbf..9c8cf2e 100644
--- a/base.py
+++ b/base.py
@@ -407,7 +407,6 @@ class BaseWindow(QMainWindow):
         self.appversion = appversion if appversion else _appversion
         self.source_file = None
         self.author = _author
-        self.appversion = _appversion
         self.title = title
         self.facility = facility
         self.user_mode = user_mode