You’re not stupid! I had the same problem too.
If you may know, a few years ago Retromatic disappeared from this website, and no longer responds to anyone’s messages. We do not know why. But we know he is still active, his website wasn’t updated too long ago.
But to solve your question, when Retromatic left, all his music left. He removed the links and his location code.
Now, if you want to buy an album of his, it’s nearly impossible to get it from him. Every password link is computer generated/very specific and he won’t respond to you, at least now he won’t.
Your best bet, and this worked for me successfully, is to contact someone on this thread who posted something about that makes it seem like they must have downloaded it. I got a bunch of Retromatic albums from various people, because I contacted them.