Shortly after the release of version 2.22 there was a new version 2.23 of the GOG-Downloader for Debian Linux (Wheezy and Jessie) released in the Repository.
This version fixes potential problems with the GOG-login.

You can also download the deb-packages from here:

http://mash-systeme.de/downloads-view-content

Changelog:

LGOGDownloader 2.23
- Option to show wishlist is no longer saved to config file
- Added simple login check as a fallback to current complex HTTP login check
* This fallback method should work even if GOG changes the site layout as long as account page location remains the same
- Fixed error with login when cookies didn't exist but API login worked because config.cfg contained valid secret and token