For those in the same boat. My link to the $149 upgrade did not work. I sent an email to Celemony and within minutes got a new corrected link. This was also on Satruday. They have remarkable support for a weekend. Thanks for this thread and for the info to email them. It worked.
BTW, I just entered the new serial number in my Sonar's Melodyne Essential and it immediately upgraded from Essential to Editor. Just have to also download the standalone version, but Sonar ARA version was just a matter of entering in the new serial number. Voila! It is done.