Yes, to be able to add a new license, you have to stop the server. Please follow these steps to add a new license to the Floating License Server:

1. Go to License > License Manager >Stop service.
2. Go to License > Activate and enter the Order ID and proxy (if present).
3. Click Activate.
4. Go to License > License Manager > Start service.

The Floating License Server is now ready to serve licenses to clients according to the terms of the new license.