I've been trying to get back into mapping, but I have been having an issue with hammer that I cannot seem to fix. Whenever I click Browse on the texture viewer, Hammer locks up, but doesn't freeze. I did some scrolling through the dropdown, and I noticed that a lot of the dev textures are missing. I did try to fix this by re-installing TF2, however it didn't help, hammer still locks up, and the textures are still missing. What could be causing it?