Have you tried going back to your confirmation email from last year and clicking the link in there to see if it takes you to the Full game download page? it does that for me on another game I've gotten.
You mean the "You own this game" banner on top of the game page? The "Download" button there only led to the Demo downloads. There is no "confirmation email" I could go back to.
That's very kind of you, but not necessary. I already lost interest in the game, since I can't get rid of the feeling that it has been rushed to the finish by abandoning planned content, which is the same feeling I had with "Confined with Goddesses" when it was suddenly listed as complete.