Re-activating old Permanent License
Hello,
I have an old License, perpetual, for Wildfire 5.0. We no longer actively use Pro Engineer but would like to re-activate this license for viewing of legacy designs. Machines in service occasionally need to be viewed for various reasons. We own this license, so as far as I see it we should be able to use it. I understand we cannot upgrade or do anything fancy with it. But for opening and viewing existing documents, a license we already paid for should work. I have edited the license file (which I kept from way back when), to update the MACC Address of the license server machine. But each attempt to install and run the license server gives me this error:
(ptc_d) Invalid license key (inconsistent authentication code)
Attempts to look this error up online take me to a Knowledge Base that I cannot access without updating my maintenance, which I find to be just unacceptable.
Any thoughts on how I can get my existing, bought and paid for, license of WF5 up and running without having to pay for it again?

