The most recent version is 0.6.2a and it could be you computer/pc bcz mine runs 1000 fps on toaster grapichs and 300 on the higest grahpics :/
hmm, I mean it runs fine until it crashes out of a sudden, there are no stutters.
By "fine" I mean constant 180 FPS on almost the highest settings due to Vsync. Whether I have 700 or 180 FPS it crashes all the same. I also tested the x32 version and nothing changes aside from more errors in the log. :