The MathLM license manager is used to distribute licenses for network installations of Mathematica. After updating Mathematica to a newer major version, you also need to upgrade to the equivalent or later version of MathLM.

To upgrade your MathLM installation and have it start using the new license information, you need to collect the MathLM installer and all necessary license details, stop the current MathLM service, install the new MathLM and restart the service. During the MathLM installation, you will be prompted to uninstall the previous MathLM and update the Mathematica license information.
 

1. Download the current MathLM installer from the User Portal.
2. Start a command prompt with administrator privilege.
3. Stop the MathLM service by executing the following command:

    mathlm -uninstall 

4. Using the new installer obtained in step 1, install MathLM.
5. Update your MathLM license information if necessary.
6. Restart the MathLM service by executing the following command:

    mathlm -install