I have a problem, everything works except for the gametype library, when I try to load it I get the error " Model models/editor/axis_helper.mdl not found and models/error.mdl couldn't be loaded ", and then Hammer crashes...
FIXED, I removed the some files from the tf2 bin folder, hammer.exe, hammer.vdf, hammer_dll.dll and hammer.bat. After that I revalidated TF2 so the files would be redownloaded, I reinstalled the resource pack and now everything works perfectly!