I had made a test installation on site A, without identifying as -TESTINSTALL, so when I wanted to try it on the real site (B), it would not let me. Since I had only played with the Site A installation with a dozen images in 3 categories and 2 members to test, I figured it would be as simple to remove both (from Sites A and B) to start from scratch. I reset the licence and I think I am set up correctly now with the -TESTINSTALL on Site A. Then, I should be able to add it to Site B without issue.
So, I think I have solved my issue with answers from this thread.