When you change the server, you can activate an existing license. To use the license on a new server, follow these steps:
Navigate to your Personal Account under Products → Licenses → Edit → License Key.
Change the IP address to a new one and generate a new license key.
Run the command on the new server:
/usr/local/mgr5/sbin/licctl fetch ispmgr <license activation key>CODE
The license can only be active on one server at a time