I'm doing a survival play through with some friends and we have some mods. Not a pack, we just downloaded the exact same mods. I was going to play some single player and downloaded technic launcher and then hexxit. (a modpack) Next time I wanted to play with my friends, it wouldn't let me connect. My other friend connected fine. I tried uninstalling hexxit and technic, but it still wouldn't work. Is it possible hexxit could have messed up my mods folder or any thing else in the %appdata% (roaming) folder.