Hello,

If you have installed 2.5 then that's what you have but there is a 2.6.
To answer your questions

1.The light does go out.
2.The light goes out here too.
3.The fuel cut off switches do cut the fuel and stop the engines.
4. The flap indicator gauges work.

I would suggest that you go to your account and download version 2.6.
Then first uninstall your version using the Control Panel/Programs and Features list.
If you have repaints, remember to back up the aircraft.cfg file.
If you have a registry cleaner, at this point clean your registry.
This may not be necessary but can't hurt.
Only when your have done this, run the 2.6 installer.