You can simply go to the C:\Program Files\ANSYS Inc\Shared Files\licensing\license_files directory and delete the old ansyslmd.lic file. then launch the Ansys License Management Center and install the new license file. Once the new license is added, you should not see the message + the software should work without license error.
Can you post a screenshot or past the product lines in the old and new license?
You are navigating away from the AIS Discovery experience