Chris, two settings to check/change in Skydemon.
a) Go into Settings/Connectivity Options. Ensure FLARM is ticked, then change the Air Connect Key at the bottom to 6000 (the default is usually 1234)
b). Go into Settings/Navigation Options. Scroll down to the bottom, then increase 'Show within vertically' to circa 40,000' in order to see airline traffic.
Oh, and yes, you must start the CollisionAware app.