Torchlight 2 crashes at loading screen.

So here's the deal: I can't even play TL2, because when i start it it crashes at the very first loading screen so I can't even get to the menu. The thing is that I played with the synergies mod over the last two weeks, but when my friend bought the game 3 days ago i couldn't join his game in multiplayer because he didn't have the mod. So i uninstalled the game and installed it again to be able to play with him. It worked just fine, excpet when i tried to select my modded character the game crashed, but no problem i could easily make a vanilla character and we could play. But NOW 3 days later (actually it happened the first time yesterday) I can't even start the game. What the hell?! I tried to reinstall it like 3 times, turning off and on steam, see if it works, but nothing, i keep getting the crash report window when i try to start the game. Did any of you meet this problem before? Probably it has something to do with the mod, but it worked good without the mod for a day. Is there a way to completely wipe out the cloud saved games or something? I'm so fucking annoyed by this. :(