Alright, I don't know whether you're referring to Don't Starve or Don't Starve Together, but this being the location of this statement, I'll assume you mean DST. So, first off, you can't complain about a game crashing when it's in BETA. DST is clearly labeled as Early Access, and you should be aware that it is. The game is known to have bugs, broken aspects, that's why it's a Beta. If the game started having issues after you installed mods (not add-ons, mods and add-ons are different things, and add-ons aren't a part of DST as far as I know) then it isn't Klei's fault. You might be able to contact the mod creator via Steam, and see if this is a bug caused by their mods, and see if they have a solution to it. If you uninstalled everything, and it still has issues after installing it again, I don't know how to help.