Hello everyone,
We wish you a happy new year :)
We come with some good news: the DLC issues have been fixed. We apologize again for the trouble it may have caused.
It is now possible to buy any DLC for any GCH version, even if you don't own both GCH versions.
The DLCs you may own with the base GCH version are still available for free with the Portfolio version (and vice versa).
Last but not least, a new GCH update is planned for mid January. It contains a bunch of bug fixes (it notably fixes the layer composition mode issue) and provides a new user interface to help you import custom resources into GCH without having to use the command line tool. The next major update will bring Steam Workshop support.