I'm having trouble getting your application to run on my windows XP SP3 system.
Version 6.1
opening file explorer and clicking on ....GUI.exe, I see opening window of your GUI app for about 3 seconds, it then disappears and file explorer just hangs with a hourglass cursor. Task manager says file explorer is not responding, can't quit file explorer and have to reboot to recover.
Version 6.0
Opening file explorer and click on ....GUI.exe , I get opening window of your GUI app. Select Uno board and point to a arduino sketch .ino file and then click on comm 5 (my uno board's comm port) and GUI says error uploading.
Lefty