Do you get any specific error message(s) when your game crashes? Exactly where and when do you crash? Also have you maybe been installing mods or messing around with you game files in any way?
If you've been working on maps of any sort you could always try checking your "particles" folder and deleting any double particles. They would end in numbers like _0 or _1 etc. If it's not particles or just the normal server derps that make you crash chances are you might have to uninstall and delete your Feral Heart folder before reinstalling your game. I know you'd hate to have to do that but if it comes to that just back up all your important files like maps, presets, and screenshots etc.
