Problem solved! Uninstall, reinstall...couple of hiccups reinstalling the Face tracker and Motion 3D plugins, but I was able to do it.
I want to tell everyone that Reallusion support is some of the best ever. They say to allow for 2-3 day response, but they have never, ever taken that long. I had responses within 24 hours. The support techs are very helpful and patient, even when the problem is my own fault. I love the software, and the support I receive is a big factor in this.
I would be so happy if there was a way, as a Mac user, to use the full body and hand mocaps, and to use iClone. I know that's not Reallusion's fault. I thought of switching to Windows, but after so many years, with so many files, and being older, it would be extremely difficult. 😣
Reallusion rocks!