I eventually got an automated reply to my support request apologizing for the long delay, with a link to the how do I download my purchases support page. I replied to keep the ticket open and included a list of other games I had since discovered weren't working also. I received another reply, supposedly from a human, but it seemed automated or copy pasted and included the same link and they closed the ticket and marked it as resolved.
charlemagne1980: Their offline installers are a scan; prime example, ArmA Cold War Assault 513MB download fails at 435GB; 2GB files also fail at varying points, regardless of on my ISP or someone else's. Best to not pay any more for such willful negligence on GoG's part (this is far way from something new at this point).
I just downloaded ArmA Cold War Assault, through Galaxy and my browser, and it downloaded from both just fine.
I have never had problems before with downloading offline installers through Galaxy. I prefer to use Galaxy to download offline installers and extras because it's faster and more reliable than downloading through a browser. It's one click to get all of the extras, and the same for large games, one click to get all parts.
At first I thought it was just the Wadjet games. They all received updates "recently" (well it's going on 3 months now since the updates), around the same time, and none of them will download through Galaxy. I can download them through a browser. They're one part and fairly small, so it's not a problem. I just hope it doesn't start happening to larger games. It's not just the Wadjet games though. I've discovered a few other games that won't download. The only thing in common is it seems to be happening with
small games (<100MB to ~500MB) that have been updated within the past ~3 months.
Since I originally posted, two of the games, Gemini Rue and Blackwell Episode 1 now download through Galaxy, but the rest still wont.
I've been downloading games that are finished and not receiving updates anymore. A few days ago, I downloaded two game's offline installers through Galaxy, one 30GB and one 20GB. Today I downloaded two more at 15GB and 25GB. No problem with either of those, but they were last updated 9 months to a year or more.