Follow instructions below to add Cortona3D Product floating license to your License Server.
· Launch License Administrator on your License Server machine. Click Start, go to RapidAuthor > License Administrator (Server);
· Click the Add New License button on the right;
· In the Add New License dialog box click the Browse button, select the downloaded file and click OK.
Refer to this article for instructions on adding a License Server to Server List on a client computer.