1Both PCs need to be accessible if possible.
2Starting with the outgoing PC - you need to deactivate the current licence so that the software can no longer be used on that machine
3Get the user to log into the software and on the licence status box (within the software under the Tools option) and click on Modify Licence or Renew or Upgrade Licence
4On Pivotal, go to the Licences area on the left hand side menu
5Select New NCL Generate Licence and enter the product.
6Select a date of one month prior to todays date and complete the rest of the licencing process using this tool
7"Unlock" the existing software thus rendering that licence immediately out of date and unusable and then move to the new server. 
8Check that the user has installed the latest disk/download on the new machine.
9Licence the product using the standard procedure