So just to be clear, if I start playing now and progress through the game, if I reach the end of the completed chapters and a new one comes out, I can just continue fine? I got a bit confused by the post on page one, I'm not sure how all the versions work or how to get started haha
It's (nearly) always the intention of the creator to make new Beta's compatible with the old ones, that doesn't necessarily mean that it will always be the case.
If I remember correctly, there was stated here that Beta 15 should be compatible with savefiles from Beta 14. Nothing has been said about eventual later Beta's though.