@Gertjan
@johnpoz
Thank you both for the good information and encouragement.
I was able to successfully update my way back to 22.05!
Johnpoz, your graphical description helped me go to: System/Update/System Update/Branch/pfSense Plus Upgrade where I was indeed able to upgrade from pfSense 2.6.0 CE to pfSense Plus version 22.01
After that upgrade completed, I was able to update to 22.05 like you suggested:
fc917bd1-4f79-43c6-8e15-3b4c6694b662-image.png
I selected the PREVIOUS version, it was as simple as that.
After running on 22.05 for a few minutes, I performed a restore by picking the XML file that I had made just prior to attempting to update to 23.01 three days ago.
pfSense and my freeRADIUS setup are now completely restored.
For now, I will sit back and read the Installation topics as they relate to 23.01 and decide when to make the leap.
BTW, pfSense is running on Dell Optiplex 3060 SFF both at home and at work.
Thanks again, you two!