Access this window from the menu via Plugin > LiveTraffic > Status / Information...
or via a keyboard shortcut / joystick button you bind to this menu command.
This window offers 4 tabs with the following functonality:
​Aircraft List - lists all aircraft known to LiveTraffic with a lot of detailed information and some actions that can be triggered directly from this list
​Messages - the latest messages that were shown in the message area or written to Log.txt
​Status / About - general information on number of aircraft, TCAS status, channel status; along with background information / copyright / credits of the software
​UI Settings - a few settings affecting the appearance of this window (and the Aircraft Info Window combined)
See the above link for details per tab.
​