An MZpack license is linked to your PCs with product activation. But if you change machines or its hardware parts, you will be able to transfer your license within 24 business hours by purchasing this transfer service (one per request).  

1. Uninstall MZpack from your current machine (if available)
2. Purchase Transfer Service
3. Wait for the completion of your order
4. Install MZpack on a new machine
5. Activate MZpack using your existing license key

Actually, for MZpack 3, all of your activations will be released upon your purchase of the transfer service. So, any (or all) of activations of your particular license can be moved to another machine(s)