Public Key Token error message - License not recognised

I decided to buy the Education License a month early in the hope it would fix the error.
I deinstalled Evaluation and installed the new version with my new License code but I am getting the exact same errors…

I am currently using Rhino 6 Evaluation and it is due to expire on June 28th. (Now using Rhino 6 Education license)
I tried to open Rhino Yesterday and got an error message
"Could not load file or assembly ‘System.Management, Version =, Culture = neutral, PublicKeyToken=b03f5f7f11d50a3a or one of its dependencies. The system cannot find the file specified’
When I try to reenter my license code I get an error that says
‘Rhino requires a license to run, Rhino will now exit’
I have uninstalled and reinstalled but still getting the same messages.



@brian - do you have an idea about this one?


Hi @v.overell - sorry for the slow reply. Have you tried installing the latest .NET framework from - this may solve the problem.

Hi Brian
Thanks for your respones
I already have the latest .NET framework installed…
The sales team suggested I set up a Cloud Zoo.
I currently have it set up for use on my computer only.