How to redeem Dorico 3.5 to 4 Pro eligible upgrade?

[dspreadbury]

Please see here:

Grace period campaign ID missing

It’s a little bug in our online services, caused by the fact that you have multiple eLicensers in eLicenser Control Center. We’re working on a fix! Update (2022-01-13) This has now been fixed. If you still encounter a problem related to a grace period update, please post a reply to this thread or open a new one.

If you still have problems, just let me know.