If you move the mouse to this area, you should get a click spot. Also, by turning on the option to see the click regions, you should see a small green line (the manipulator is just behind the 3D object, so is mostly hidden from view). If you don't get that, I will send you my cockpit.obj file that works for sure.
As I've posted in the features list:
Propeller simulation is off, and will be addressed in the next update. There are some changes in the latests XP11 version that partially have change the propeller (and engine) operations. Avanti's engines are almost identical with Austin's one, so the changes have affected a lot, and "broke" the way things were working before. This was not trivial to be solved within the time I had available, for this release.
With condition levers at MAX PWR and PWR levers at idle, you get around 1015 rpm and torque around 4.5%, but as soon as you advance the PWR levers a bit (torque ~16%) you will get 2000 rpm. Well this is not spot on, but let's say "ok", until I fix it.
AFX is the indication that the AUTOFEATHER is armed (switch on and Ng above 90%).