Installed. No new content. Uninstalled and re-installed. Nothing changed. What is missing?

Did you install it across different platforms? What I mean is did you install the GoG DLC on a Steam copy, or vice versa?

Just yesterday i bought the game with dlc and installed both i do have the survival part of the game also so i guess it does work but don't have galaxy so i think there will be no weekly survival just random survival sim or what is it called.

Mad late reply, but I actually downloaded the offline installers recently and had the same issue as you.

Manually clicking the the DLC set up .exe file fixed it. You might have to copy and pate the contents over to your SOR4 folder, depending on you how you organize your download files.