Ok, so I found the version 0.10, but unfortunately it forcefully updates to the version 0.12.5.5, which I already tried, and it can't import 0.09 saves. And also the version 0.10 doesn't even start without internet connection, so it's impossible to bypass updating it. This is very lame, and there's no meaningful and valid reason to implement a forced update. Looks like now there's really no way to import old saves even if you go through the hassle of finding all old versions of the game like I did. I just wanted to wait until there's substantially more content before continuing to play, which makes a lot of sense, but the developers decided to force people to either play the game constantly or start everything anew.