So I just got prompted, that I can update to 2.0, which I did. The problem now is, that Galaxy 2.0 doesn't list all my games, which I have on my account.

The website (www.gog.com/account) says, that I have 70 games in my collection, but Galaxy 2.0 only counts 68. And lucky as I am, one of the two being Hollow Knight, which is exactly, what I want to play.

How to fix this?

(The second title missing would be "Hotline Miami 2: Wrong Number - Digital Comics", which is no game apparently, so I guess, it is ok, that Galaxy 2.0 doesn't show it. Nevertheless it is confusing, when the numbers are off...)

Edit: I now also reported the problem in the issue tracker.