There are two Licensing Servers in the environment - one for production and one for a backup. They have separate licenses activated - production license and backup license. After the activation of both licenses, the ServerAddress in the LicensingSettings.xml file on the computer with the License Manager installed was changed to the address of the production Licensing Server. The information about the backup license disappeared from the License Manager.
The information about activated licenses is saved in the Licensing Server where the license was activated, not in the License Manager.
This is the correct behavior. If on the computer with the License Manager installed ServerAddress in the LicensingSettings.xml file was changed to the address of a different Licensing Server, the License Manager will show only the information about the licenses activated on a currently specified Licensing Server.