This is a general GOG problem and the reason why I bought it _again_ on Steam. They are always late. It's my understanding that there is _one_ dude at GOG that does the Linux packaging (rocket science to build a self extracting SH script) and when that one has a day off or is sick or whatever we get crickets. It's frustrating to a point that I used the Windows installers in the past and unpacked the DLCs manually.