Hammer, etc opens fine, but upon tying to open any map, or even a new project, will cause a crash.

I used Visual Studio to try and make sense of this because there was nothing I could find related to it and according to VS vguimatsurface.dll is throwing Access Violations.

I'm going to attempt a full wipe of the game and reinstall, but curious if anyone has run into this issue or knows how to solve it?

I can post more info if it's needed, just ask. Thank you.