It appears there's one on the site now. My first unit ran fine from the outset, and I only updated it because of what I read. The second unit started fine, but developed a very annoying and somewhat intermittent fault. I kept meaning to update it to see if that would cure it, and never did. At the last gig, it really annoyed me, and I updated it on the fly, as it were. I was surprised to see that the new version which appeared was 2.5.2, and not 2.5.0 as I expected. Seems there's an update.
BTW, the fault was that at the end of certain songs, the unit would lose contact with the HD, and reboot. You soon learn to keep the other unit fully primed.