I'm playing Thief Gold on Windows 10 and whenever I change the resolution from 640x480 the game crashes! Even if that's all I change, and I set it to something compatible like 1024x768, or seemingly any resolution that I choose! What's wrong with it?

I used TFix. Oddly, it didn't seem to patch the game with all of the new textures and stuff like it said it would, but at least the resolution works great now. Thanks.

depends on what you have selected when patching up. also remember, these are not hires textures by today's standards, they are just T2 level res. think 128*128 to 256*256 instead of 32*32 to 64*64.