I remember not having any problem with gog downloader 100 days ago, but now when I'm back for the promo (Gabriel Knight), I am having trouble downloading the games.
Adding the 1st game without any problem
Adding the 2nd game didnt work at all.
Adding the 3rd game did only add the 2nd game.
So I was playing smart, so I tried to add something else, to put the 3rd game in the queue. Nop, didnt work
So now I tried clicking like crazy on the add to queue button. Now I cant add anything at all to the queue. I tried removing everything from it, but now I cant add anything but the 3rd game.
How do I fix the queue? I want the game to be downloaded and ready while I am away.

ah well.. its a common problem then.

Not really, I just tested the downloader and it is working fine for me. Most likely, you just weren't patient enough with it and hosed something by "clicking like crazy on the add to queue button". After clicking the add button, it does take a minute for the download to appear, so rather than continuing to click on random things to download, you probably should have just waited or clicked the "Refresh queue?" link.

I´m having problems with it to. The downloader starts and shows up in the Tool-bar (lovest part on the screen in Win 7, called verktygsfält in Swedish) but I can not open the window and see the progress of the download.

yes I did both wait and refresh. all before clicking like crazy
Clicking like crazy should not break it anyway.

If it weren't beta software, I might agree with you, but it is a beta and doing "crazy" things like that can and will break it.

Frainly, the GOG downloader is buggy as hell.

Glad to know that this was a problem with the software and not my computer. I was having the same problem downloading GK3.