Minecraft Win10 Edition - BSOD + Save bug

While playing the new beta a CRITICAL_PROCESS_DIED error occurred forcing my PC to restart. The game was still running when this happened. Once brought back, I opened the game but my save was changed from a Survival game to a Creative game, effectively erasing everything in the inventory while leaving everything outside, like contents in chests, intact. I'm not sure what version this is supposed to be so I opted for 1.8.8. Apologies if this is not right.