This page entails the licensing information for the agent and includes:

You may license your agent depending on your network set up.


To add your license, copy the contents of your license file and go to Add License and paste into the field.  Click Add.

When a license is added in standalone agents, your agent is automatically licensed. You do not have to restart the service.

 

If you reinstall your agent then you will require to re-add the license, if it is a standalone agent.