This is very strange..
Is there anything written in the "C:\Users\USER NAME\AppData\Roaming\KoHighlights\error_log_2020-xx-xx.txt" (xx-xx is month-day)?
Unfortunately, KOHighlights does not have a proper logging system..
There seems to be some problem with the PySide in your system.
I'm using Win7x64 SP1 myself.
Do you use the x86 version?
Another thing you can try is to install another app of mine (e.g.
KataLib), that also uses the PySide library, to see how it goes.