Odd issue. Likely something this newbie did wrong, but here it is:
Upgraded CorePlus from 6.2 to 6.3 by coping core.gz into place (and vmlinuz as well but it was identical to 6.2).
I then installed to USB. It booted and said it was 6.3 and I verified by going into Apps and doing Upgrade Maintenance -- 6.3.
HOWEVER, when I reboot using as source the hard drive I had copied 6.3 to (overwriting 6.2) the Apps Update Maintenance still says its 6.2 and I needs to be upgraded.
?
So how is this possible? The USB was a clone of the hard drive???