I was able to go to Options but 'Music Collection Files' was the only option in the dropdown list. However, I couldn't click it. After doing so, I was able to select the *.mcf. So that is the good news. I began moving my collection from my NAS to the USB drive. After VS reported that it would take ~13 hours via ethernet, I aborted figuring that I would do that during the overnight.
However, before aborting, and on my first run, my raw files A-Ba were not on the list. Part of that may be captured in the screen recording that I will send to you by email (I do have backups, so if they are gone I can get them back).