I bought Rhino 4 (Windows) full price commercial version IIRC around 10 years ago. It has been transferred from PC to PC over that time and I love it. I tried to use it recently and it gives me this popup:
The Rhino web site says all licences are permanent and do not expire. How do I get my version to run again?
Thanks
Barry
Barry what operating system are you using? This might be an issue of compatibility.
Sorry, I just reentered the licence key from the CD box and it opened fine. Hadn’t tried that 
Many thanks, deleting post now 
OK, can’t delete topic, but consider it closed. TVM.
That symptom is an oddity of V4.
When Rhino can not read the license information in
C:\Program Files (x86)\Rhinoceros 4.0\System\rhino.key
It incorrectly reports the license is expired.
Entering the license key again as you did is the fix.
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