One of our testers found an issue whereby they had all switches set to OFF and yet the NAV lights were ON and strobes were flashing.
It transpires that Honeycomb bravo was also loaded in and it's key-binds bypassed Fenix's.
The solution to this particular issue is to turn off the external honeycomb application before loading into the simulation. This way the switches will NOT be over-ridden by the Honeycomb.