Hey mate. I actually found a way to use v0.5. Was actually looking for this version and made an account just to post the solution. Simply change the date to "01 September 2016" on your PC. The popup seems to be running on some kind of timer that disables the game past a certain date. Why? My best guess is, before the kickstarter flopped, the creator thought that it would be a good idea to limit the demo so that people would download an "official" or more accessible version on steam after the kickstarter had reached its goal. Unfortunately, the full game would never be dropped and we didn't get another demo. Sad to see this game die, it really had potential. Hope this helps!