Well, I don't have Horizons 4.0, and you just announced that there's no way for me to get it, because I have Odyssey. Thanks for nothing, I guess.Anyone with Horizons 4.0 can play together.
Now that the decision to make Odyssey and Horizons 4.0 separate games is final, can I please have an option to uninstall client 3.8 and free those 20 GB it occupies? I purchased the game through Steam, so if I uninstall from the Frontier launcher, Steam will at some point notice the missing files and redownload them.