When going to the main menu from an active flight, the Flight option does not provide an Edit -> Flight, only an Edit -> Configuration. Then selecting this, provides only Resume Flight options, unless you change the plane, then a New Flight option appears.
As options should allow to fly without having to Save the flight, going from an active flight to the main menu, only allows Saving a Flight to end it option. Why the Main Menu, when leaving an active flight, doesn't have an "End Flight" and a "New Flight" option is amazing.
Having to Quit X-plane and restart, wiithout having to go through a quagmire, sure makes flying and quitting much more difficult than it should be.