When I went to "help" and chose "license", I was not given an opportunity to choose registration number and type it in. I was taken to a place to confirm the license for essential, even though it was already registered and confirmed by email.
My case may be different because I was given an opportunity to upgrade immediately during the process of registering essential. This included a download of the program. I then installed the program from "setup" in the download files, but it only gave the chance to repair, re-install or remove the program (from installshield). I chose re-install, and it only took a second, but the program when I ran it was still only essential.
Today I removed essential and installed editor from the download I was sent. This time of course it just did the install. The download was personalized so that the registration for editor was already there. I didn't have to enter it.
Again, I did not get editor through the email offer and go to the site. I got it immediately during the process of registering essential (you guys had me so excited I didn't give it a second thought.) So this may not apply to any other type of installation. Nonetheless, a simple uninstall essential/install editor download took less than 5 min. Everything works perfectly.
Thank you all for your advice. This board clearly rocks.