Since the Recorder is uniquely associated with the Relay Server, the Recorder installer must be downloaded by logging into the Relay Server with a presenter account. Both Windows and Mac installer will be found at the right after logging in.
Relay Server Administrators can also obtain the installers at:
{base url}/Relay/Downloads/CamtasiaRelayRecorder.exe (Windows)
{base url}/Relay/Downloads/MacCamtasiaRelayRecorder.zip (Mac)