Microsoft .net framework error?

[NigelsNutInLaw]

The other day i got this error when trying to use SevenConverter. I cant use it at all every button I click just bring up this message.
I've tried restarting my computer, downloading SevenConverter, repairing .net framework/re downloading (only to be told i have it)

"Microsoft .NET Frame
Unhandled exception has occurred in your application. If you click Continue, the application will ignore this error and attempt to continue. If you click Quit, the application will close immediately."

Deatils.txt

SevenConverter 1.5.7.0

Windows 11 Home
Version 23H2
OS build 22631.5039