I get a wrong user name/password error message when trying to download my DRM free games.
This error message may appear if you keep entering your password incorrectly or if you are trying to log in with your username. Please, use only your GG email address to download your games.
Our GG Launcher is a bit old and it can't recognize emails containing more than 30 characters. This is another reason why you might be encountering this authorization issue. If this is the case, you should switch your GG account over to another email address which contains fewer characters.
Please refer to this guide to change your GG email address.