Thanks for the advice...
Follow the prompts, reprogram your hardware protection key, yada, yada.
Dave Olufs
Just 4 Measure, Ltd
iMac Pro 3.2GHz Quad, 32GB, OSX 10.13.6, AC-5, 6, 6.5, 7, stopped for a few years--started again with 12 thru 17, 18 or 19 didn't work, then 20, 21, now skipped to 23. Started in 1976 hand-drafting ink on mylar...