Something in Spacebuild... Random Crashes

Just a couple of hours ago, I joined my friends server to play Spacebuild. He tells me the server im playing was out of date. (As was my Spacebuild.) He was right. But after I downloaded the files from his server (660 files to be exact.) I’ve started crashing no more than 10 minutes into a game. And sometimes when I click a Stool it will crash. I downloaded random things like EngineMod and a newer version of Spacebuild from that load. And I cant seem to find where all those things went. Will I have to reinstall Gmod and all my mods?