Purchased and downloaded Adventure Awaits, and not working

I purchased Adventure Awaits as a preorder, downloaded it after it came out and now I can't use it. I have restarted computer and game multiple times. It shows the world as not available because I do not have the pack, but then if I go to "purchase" the pack, it says I already own it. I have tried starting a new game. No luck.  Mods have been disabled and removed entirely from Mods folder. Please help.