Perhaps the J River crew is on holiday (I think there was no JR activity yesterday), but let's try if we can work this out.
You didn't mention what MC9 version you are using. Is it MC9 or MC 9.1? Do you have an MJ8 license (MC9 upgrade was free for earlier licensed MJ8 users) or did you actually bought an MC9 license too? The upgrade price is the same in both cases, but I don't know if that makes any difference otherwise. Did you use MS Internet Explorer? J River recommends it.
During the MC11 development the licensing policy was changed from expiring builds to the current model. At that time I lost my MC10 license (I have them both installed in different folders). I fixed that by installing a newer MC10 version on top of that earlier version. No restore was needed.
You could try the next procedure:
- If you don't have an MC11 library backup (made before the try-out expired) copy the entire MC11 library folder (a folder with the MC database files, not your music files) to a safe place.
- Download and install
the latest MC9.1 to a separate folder, e.g. "C:\MC9temp". Don't uninstall MC11.
- Apply or restore your MJ8 or MC9 license if needed.
- Try to start MC11 and check if you can buy the upgrade from the MC11 startup window.
- If that does not work download and install
the latest MC10 to a separate folder, e.g. "C:\MC10temp". Don't uninstall anything. The purpose of this is to find out if that changes something in the Windows registry and allows MC11 to see the earlier licenses.
I don't know if the MC9.x -> MC11 problem is common. Has anybody else experienced it?
I think that if nothing helps J River can give you refund if you buy MC11 at full price, but don't count on that, it's just my guess.