Crashing. :(

The game keeps crashing on me. I stay in the game but when i break blocks they disappear, I can't access chests/backpacks. When I try to quit, it freezes and I have to force quit. I get this stuff. "24/02/16 8:32 PM [info] Looking for orphaned versions to clean up... 24/02/16 8:32 PM [info] Cleaning up orphaned object 207cf48a3391e7f9d99e8e47af121accf5691bc3 24/02/16 8:32 PM [info] Cleaning up orphaned object 7bae787a522e0fbe55075525134ad9e7fdc2ba0e 24/02/16 8:32 PM [info] Cleaning up orphaned object 86f83d705aa764a5fe6c802b70dd7cadd929f430 24/02/16 8:32 PM [info] Looking for old natives & assets to clean up... 24/02/16 8:38 PM [error] Game ended with bad state (exit code -805306369) 24/02/16 8:38 PM [info] Ignoring visibility rule and showing launcher due to a game crash"

When I go back in, I can open new worlds, or other worlds but I cannot open this one until I restart my computer. I wanted to keep my save file and reinstall but when copying it, it stops at "53 items remaining" and will not keep going.