V2.1 changes include: quick sound setup test; menu items grayed out when not ready; activation of autopilot at user’s discretion; ‘semi-automatic mode’ now available for both Pattern Control and Precision Approach; better setup options for straight-in Precision Approach; improved sequencing of glidepath and centerline callouts; synchronized heading callouts in autopilot and manual modes; “slightly above/below glidepath” added to height callouts; left/right orientation bug added to centerline offset number; revised manual.