The LIVE Server is the main interface with your system. The provisioner is used to manage the devices in the system, and the scenario editor lets you control and modify your training system.
To Access it you must open a browser (Google Chrome) on any machine on you LIVE network. In most cases this will be isolated from the facility network at large. Type into the address bar of the browser the IP Address of the LIVE Server. It will be labeled on the machine itself, something like "192.168.1.27"
Once there you will see a screen to run the "Desktop" or "Web" app. Since you are using this thought the "Web App" and the Scenario page will show up. Use the links in the upper left hand corner to navigate though the system.