Hi, I was wondering in case anyone know how to prevent the Galaxy from updating into the 2.0 version. I find the older version way more convenient and it gets frustrating having to reinstall the older version, uninstalling and then reinstalling all the games as soon it auto updates, which it sometimes does when I turn of the computer.
It's way easier to navigate, finding new games, old games, owned and installed games, and games that is ONLY on the gog Galaxy platform.

Short answer is delete this, Delete C:\ProgramData\GOG.com\Galaxy\redists\GalaxyUpdater.exe

Long answers are in this thread.

https://www.gog.com/forum/general_beta_gog_galaxy_2.0/how_to_keep_galaxy_v12_client_and_avoid_the_forced_v20_beta_update

read the long answer and yes it works