Can't Perform Upgrade

[klanctot]

(Posted 3 days ago as trouble ticket, no reads or responses)

I am currently on Hoster 3.321. It works correctly. I purchased and downloaded the hoster 4.08 update. I have tried several times to install this update, carefully copying the update key from the bottom of the registration page. I also re-downloaded the hoster408setup.exe in case it was corrupt. When I do the submit to MTU step, it comes back with 'You entered an upgrade registration code in the original registration code field" ???????? I then tried using the registration code under 'show registration code' on the 3.321 version, and got 'This registration code is for a different product....." What does it want, and where do I find it??????