gameinfo.txt is missing

GrainPain

L1: Registered
Dec 31, 2016
2
0
Hello. I am trying to get Hammer to work so I can create a map for an animation project. However, whenever I try to start Hammer, it says that a gameinfo.txt file is missing. I examined the error and it also appears that it is reading the wrong file address, the current one that's trying to be read being the file address from my old PC. How can I change the file address path to this current PC and get Hammer working? Also, whenever Hammer is functional, what additional models/prefabs/resources should I get that would make the mapping process much simpler for me?