FYI, games are not tied to Galaxy Client - you can safely uninstall it, play your games without it, update them manually downloading updates from GOG.com, install DLCs or new games. You can install Galaxy Client again later and scan folders for games. :) It will not remove your saves either.

Of course it's still in beta, so if you encounter something like you described, go to "GOG Galaxy beta" topic and read "bug reporting" section in the pinned post, then post a bug report as described (give as much details as possible) helping us to improve Galaxy Client. :)

Thanks mike_cesara for helping our friend here.