It's not intentional, but the free version is currently broken and I haven't got around to fixing it yet. Sorry!
Don't worry, I was just curious - could absolutely have imagined that just being an oversight on your part, so I wanted to ask.
Wouldn't it make sense to keep the last working version up until the current one is fixed? I'd expect that the majority of people looking for the free version would want to use it like a demo to try the game before buying, so missing features from the last updates shouldn't really be a concern - but I might be totally wrong there, I don't know