Ok so i'll keeps this short. When i open source Sdk and try to start Hammer it comes up with a message that i don't have the right gameinfo.txt. I did all i could and managed to fix this however the next time i opened hammer i got bombarded by pop ups which said that all my materials and tools had gone missing. I have tried every thing from reinstalling SDK, reinstalling steam to downright resetting my computer. What else can i try? This plague has destroyed all my SDks on my other computers too.