Why the Transfer box was "grayed out". I was therefore unable to reinstall the software without opening a support case?

You just need to copy the two file (gis.html and vip.html) under the Help folder of the Panoweaver root installer and save them on the safe place, and when you install the Panoweaver on THIS computer again, you could place the two file back to the Help folder, and you have the Panoweaver activated.