smeggy, thanks for taking the time to explain the steps, but I still can't get them to work.
I got ED: Horizons from Epic, but decided to show Frontier some love by buying Odyssey direct from them. Now I am stuck in the loop where Epic and their PoS launcher has no idea I bought Odyssey and Frontier has no idea I bought the base game.
First screenshot: The "Upgrade needed, close the launcher" shot
Second screenshot: The "you have not bought our stuff" message
I have sent a reply to the ticket I have open for another Odyssey install issue, but this is frustrating as hell. Any ideas?