--- a/src/eric7/Tools/TRSingleApplication.py	Thu Nov 09 11:23:48 2023 +0100
+++ b/src/eric7/Tools/TRSingleApplication.py	Thu Nov 09 14:27:21 2023 +0100
@@ -96,7 +96,7 @@
         """
         Constructor
         """
-        SingleApplicationClient.__init__(self, SAFile)
+        super.__init__(SAFile)
 
     def processArgs(self, args):
         """
@@ -112,8 +112,7 @@
         qmFiles = []
 
         for arg in args:
-            ext = os.path.splitext(arg)[1]
-            ext = ext.lower()
+            ext = os.path.splitext(arg)[1].lower()
 
             if ext == ".ui":
                 uiFiles.append(arg)