So, I bought the complete package, installed all the 36GB of data, applied the patch to the latest version.
And now when I start the game up and take a look at the "Downloadable content" section I see nothing!
Basically I only can play the original game without any DLCs.

The DLCs are all installed in the correct subfolders of the game as far as I can tell. So this whole stuff is puzzling me quite a bit.

How can I enable the DLCs on my PC?
BTW it is a Win 7 machine that is (currently) not connected to the internet.

Any advice is appreciated.

Regards

Thanks Sarafran,

your tipp solved the issue.

Always these not good managed access rights on Windows.

Regards

This is NOT the whole story! Please see this post: To summarize, DA:O stores two files in your PERSONAL "Documents" folder that determine which DLC you have access to. The GOG installer will set these correctly only for the current user when installing or repairing the game. You can fix the problem simply by making sure those files are present in Documents\BioWare\Dragon Age\Settings for each user you want to be able to run the game.