I bought it but I can't use it.

I made a purchase in the marketplace.  I added the purchase to my existing game.  I do not see where the purchased content is. What step have I skipped? This is frustrating and ridiculous. Should I be asking for a refund? Yes. I have refreshed the page / cleared cookies & cache / logged out and logged back in / closed my browser and re-opened it / restarted / waited a day / have paid service that allows for dynamic lighting. 

Maps that already have dynamic lighting set up that are game addons will never be in your art library (because dynamic lighting lines don't exist there).  They are set up as map pages, so so they should be in your map page bar ready to use.

Just to be clear, they do show up in your Game Addons dropdown to install, right?

The Aaron said: Just to be clear, they do show up in your Game Addons dropdown to install, right? If I am reading the screenshots correctly, it is there and installed (since it has the remove link by it).

Yes, it should have appeared as a map page.