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Wow! That is a big version jump! What's new in this version? I'm having a hard time finding details.
Unfortunately doesn't have a clear changelog, only this thread
The last update updated the game from 1.06 to 1.07. There are some threads about that update.
I'm not positive about this, but I think the 2.2.0 version number is referring to the GOG installer version, and not the version of the actual game. I'll bet someone will correct me if I am wrong about that.
Yeah, I think the same