I understand. There is a workaround, which is to use the old Rekordbox XML method (on the Sync page, you’ll see it in the dropdown). There are also backups of your previous RB database, you can find those here: Lexicon with Rekordbox 6 write support
The XML method is just very painful to use by itself, and very limited. I really hate that Lexicon has this bug and I am trying my best to solve it. Trust me, it is at the top of my priorities right now. Not everyone has this bug though so that also makes it difficult to pinpoint.
And you are entitled to a refund if you want. You can keep an eye on the changelog for this bug and re-join then, no hard feelings 