That's odd. However, I can confirm that the latest Steam version (0.13.19) now works perfectly, thanks to the files provided by Daniel34.

I think I'm going to buy the full version soon!

@ rootEth: did you have to roll back to a previous version to get it to work?

Similar problem here. I wasn't able to launch the game any more immediately after the latest update (0.13.19, today). Luckily I found this thread and was able to get the game running by downloading the ZIP provided by Daniel34 with the missing files folder (thank you).

I'm testing it now: it seems ...