Sketchbook does not show anything I draw

- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report
I've been using the sketchbook desktop version for windows for years now and never had any problems. However lately it is not working properly anymore. When I open up the program, everything starts correctly but when I draw something, I can't see anything on the canvas. The drawing shows up in the Layers preview but everything else stays completly blank. Also if I open up a project/ drawing I already made, it shows nothing except for the layers preview. It's impossible to do anything if I can't see what I'm doing.
I already deleted and reinstalled it multiple times and tried everything I could find to related problems but nothing worked. Also it always says there is an update available but i downloaded the latest version from the official site so it should be the most recent update shouldn't it.. And updating it directly in the program doesn't work without deleting it first either.