If you purchase new hardware or reformat or replace your drive, you will no longer need a new key to maintain full features on your Jukebox. Simply install your most recent copy of mmsetup.exe in your new PC. Click on Upgrade and then click on Reinstall to enter your key. For versions 2.2 and beyond, this key number will not change during new or re-installations.
If you ever need a new key for any reason, please email us the program's version number and its serial number from the Upgrade/Purchase Full Version/Purchase by Phone page, and we will send you a new key via email. Requests should be sent to customer_service@musicmatch.com.