serial number or My Account) access if you need to go through the activation process again after removing the license file. Make certain that you have access to your license information (e.g. Prism 7 and above: prism-license.qxt or prism-license.lic.Its filename varies by Prism version and activation type: The serial number file is also the license file.
These are instructions to delete the license or serial number file for Mac.
