There is only one version that can be purchased from Adobe. And the only freestanding version available is Lightroom 6. There seems to be some real challenges in the way Adobe is trying to steer people towards the creative cloud. You might try initiating a live chat session and see if you can get help that way.
If I could figure out the magic combination to get to a chat I would, but all the choices I make under giving them more info to get started lead only to forums. "Chat" never seems to be a choice. I have even searched for "chat" and still wind up in the same place.
What do I need to do to get to a "chat"?
If you click on that first blue highlighted area, the next blue area has a "what are my options" link in it. If you click on that options link you will be able to initiate a live chat on the next screen. I know, things are really hidden. Keep trying, you should be able to find the right link.