Go to the "Settings" category in about the middle of the list there's "System Settings", and under that, second from the bottom is "System Information". The first detail listed, "System Software" will tell you the Version. As of now the latest is 3.15.

Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris