Ice_Mage: Your library always shows the base game, which in this case is the Special Edition. When you buy the Anniversary Edition, you additionally get the Anniversary Upgrade DLC.

To download DLC from the site, click the game in your library, expand the "Download offline backup game installers" section, then scroll down to the "DLC installers" subsection. More details in the How do I download a DLC? support article.

To download or check if DLC is installed in GOG Galaxy, scroll up to post 4.

alien8472: Its a bit confusing like that, I noticed when booting up the game it is actually the AE edition lol. I installed via offline installers to be sure even.

Ice_Mage: • Click the Extras tab and check the offline installers section. The Creation Club stuff is supposed to be a single DLC package.
• If the game is already installed, click the "More" button (to the right of Play) and choose Manage Installation, then Configure. Check if there's a DLC tab to the right of Features.

GrandBreaker: So just to clarify, once I've done this the anniversary content is installed? Do I need to run the exe in the attached picture that's in the game's !downloads folder for Gog skyrim?