So just booted up the game after a long while.

I noticed alot of wierd graphic bugs such as like screantearing where I drag the mouse, or tiles changing to the ground beneth buildsing.

Also the heros level up screens on the UI dont work, its just black and I cant see the buttons to put points in different attributes or skills. Help?

Same issue. The game will automatically tab out to the desktop whenever there is an in-game pop-up for a conversation. When one goes back into the game from the desktop after it tabs itself out, there are numerous UI visual glitches that make for a hard time, and will often cause it to crash to the desktop.

The visual bugs often are UI elements completely missing and visual artifacts in the form of text from menus remaining on screen or UI backgrounds over the top of the game, making it impossible to play. The cursor will flicker and disappear completely on the menus. I haven't found a solution, so I probably will seek a refund. I bought this version after seeking a refund for the Steam version hoping that GOG would have a more stable game, and it is better, but still not playable.

On the Steam version, I got a blue screen and CTD, as well as some weirdly poor-quality framerates. Whatever you do, don't buy it on Steam.

Same issue still present, it seems like alt tabbing messes with the game ui. I've also encountered the same problems of the mouse flickering in and out and the level up screen for the hero being blacked out and unable to select anything to level up.

same, I really need a fix for this, none of the old fixes are working for me.