I installed couple models and sounds (from here: http://source.maxofs2d.net/index.php?dir=sfm/ ) I checked the files and they seem to be in correct format. I installed them in the tf folder and I skipped the models, textures that were already in the folder. When I opened hammer everything seemed fine, but when I opened the map I was making earlier hammer crashes. New map works well. Earlier I installed the files from this thread: http://tf2maps.net/downloads/sfm-beta-content-for-hammer.1275/ Since there wasn't all of the models in the file, I decided to download all of the models from the original website. After that the hammer stopped working as said above. Any ideas how to fix?