Hi! I just wanted to play some good old witcher but when i press PLAY in GOG Galaxy App nothing happens. Button just goes grey for like 3 sec and its green again. I tried to start the game from folder with the game, reinstalled, tried compatibility modes, running as administrator and this -dontForceMinReqs thing but nothing works. It doesnt show any error or anything just NOTHING happens. I'll be glad if someone could help me.

You don't say what version of Windows you are on? Assuming it is Windows.

I don't use the Galaxy client, but started having a similar problem as few days ago. Clicking on the shortcut did nothing, no game launcher appeared. Used the compatibility mode wizard and it started working fine. I can't suggest anything additional to what you've tried, except rolling back to a different system save point.

I'm not sure if this will help but it may be worth a try. Uninstall the game and then redownload all the game files again via your browser or the GOGDownloader (http://www.gog.com/downloader) and then reinstall from those files bypassing Galaxy completely. If it then runs OK you can add it to Galaxy again.

Hope this helps.