If the program has not been registered, then the current license info indicates that the copy is a evaluation edition. In this case, the license key is only using for trial, and you can not backup it. Once you have got your own license and the license key has entered successfully, the current license info will describe your license's type, serial number, etc. Now, you can backup your license anytime, just to click the Backup Your License Key button.

The network adapter's MAC address is necessary for getting your own license. When you want to purchase your own license, remember getting the MAC address right here. If there are multiple adapters, select any one of the adapters as you like for the MAC address in the combo box list.