To manage user licenses please navigate to “License management” tab, here you may see list of available licenses
Select the license type you need (look at the License type column),
Click on the “pen” icon of the selected license, click “Edit license”
Note: do not delete the license, it cannot be restored!
Select the Agent you want to assign the license with
Click “Update license” button. You will see that selected license is attached to the chosen Agent