mferrand's post in Problem Upgrading To Ver 1.9 was marked as the answer
With appearently no other option except sending the guitar to Line 6 for repair or returning it to Guiar Center, I had one more thought.
I plugged the guitar into my HD500 via the VDI cable and the HD500 into the computer via USB. I ran L6 Monkey and both (HD-500 and JTV59) showed up!. I ran the installer for ver 1.9 and .... what do you know, it worked.
Thanks for everyone comments and help.