Scaler just does not seem to work at all in Reaper

UI is completely rubbish. Below I tried to attach a screenshot.
Buttons appear unreadable and flickering on mouse over.
Running on Win 7 64 with REaper 6.23
Do I need another screen resolution or how to uninstall and reinstall the software?

Wellcome Ibn
In “FL studio Scaler 2 black screen not working” Ed1 said:

Perhaps that works for you too