When I open any version of Painter, the canvas starts looking glitched. Is there any fix for this?
Hmm, that actually looks like the "Welcome screen" that shows at startup not displaying correctly..I don't think that is a canvas. The most likely cause would be that your browser does not meet the minimum system requirements; however, it could be something else not sure. Either way if you hit "esc" hopefully the window closes and you can go file> open or file> new and paint.
There could be other issues deeper within the application if the Welcome screen isn't working due to an incompatibility; but in the very least this will get you up and painting.