The Playback window can be invoked by using the Master command line with following syntax:
uproxy.exe /g"<Gateway>" /r"<sessionID>" (GUID sessionID of recording)
uproxy.exe <recordingfile.prxrec> (recording file in local file store)
uproxy.exe http://<webservername:port>/<recordingfile.prxrec> (recording file accessible via URL on webserver)
The standard command line options "/u<username>" and "/x<password>" can be used to provide specific credentials if default credentials of current logged-on user are no sufficient. See "Command line syntax examples" for more information.