How do I resolve "The evaluation version ... No reg. write rights"?

Q: We are currently in the process of evaluating SilverDox and PDFNet.
While trying to convert PDF to Silverlight (XOD) we receive the
following message:

Exception: Message:
The evaluation version encountered an error in your system
Please contact customer support at: No reg. write
A: Using PDFNet demo on development machines is usually not a problem
because they are typically configured to have a loose security policy.
In case you are using the evaluation version on a production IIS
server, you need to grant full permissions to the assembly - or loosen
your global security policy. Please note that this does not apply to
the production version, which does not require elevated permissions.

Some of our customers were able to use the demo on servers with tight
security by modifying a config xml file that controls security
settings or using 'Code Access Security Policy' tool. For more info
please see:

Because there are many different machine configurations and because
the demo is not intended to be run in the production environment, we
are not actively supporting this use case scenario.