The manual contains detailed information about licensing.
Permanent activation keys are tied, via the system ID and machine class, to a given system where UnForm has been installed. If UnForm is moved to a new system, it will not operate until the license has been re-initialized and a new permanent activation key entered.
If a permanent key has already been generated for your serial number, then in order to obtain a new key, you must request a reset of your existing permanent key by contacting SDSI. In doing so, you must certify that UnForm will no longer be operated on the original machine, or that it is being re-installed on the same machine where it was formerly operating.