We at Illuminated Games are always hard at work! And after many hours -- far more hours than you'd believe -- I've managed to make a number of upgrades and improvements that should help improve performance for pretty much everyone. Also to hopefully fix some of the most stubborn bugs we've had. The update is now in open beta, so if you're running into problems or unsatisfactory performance, give it a try! You can enable it using your Betas menu in Steam. It should work fine with existing saves. You should also gain achievements as normal. If you still run into any problems, please report them in the discussions forum and I'll do my best to help!