After purchasing BEAM you will receive activation details via email. Find the LICENSE button in Revit in the MKS tab under the main tools.
To manage your Account visit: mksdtech.com/login and login with your BEAM credentials.
Login with email and password to access your BEAM Account on the machine. BEAM will consume a License from your account when one of the Revit tools is used and release it 1 hour after its use.