This is likely the wrong forum area, my apologies for that but I wasn't sure where this should go.

So here's my issue, I have ESO Tamriel Unlimited, I took part in the closed beta and "beat" the game back when it was P2P and then I quit playing. I have a friend getting into the game and there has been a lot of DLC released since 2013 so I figured it was time to play through it all. Currently ESO has a promotional deal where it's $10 and includes Morrowind, but I'm not able to use it as an upgrade since I already own the base game and I don't want to have to make a new account since I did participate in the closed beta. Problem being is that I can't find an upgrade option for Morrowind, in fact I can't find Morrowind for sale anywhere. Do I already have Morrowind somehow? Does the Summerset upgrade include Morrowind? I'm lost. If someone can help me I'd be much appreciated.

Essentially, I need to upgrade for Morrowind and Summerset and then I'll re-sub to ESO+ for the DLC.