Listen up, this is important and can save you a lot of headaches! Save the additional liveries you inserted (just use the livery manager to back them up) Using the software control applet de-install the current busses Manually check and remove when found:  C:\Users\yourname\Documents\Aerosoft\Airbus folder FSXMainFolder\Aerosoft\Airbus_Fallback folder FSXMainFolder\SimObjects\Airplanes\all aerosoft airbus folders De-activate your virus scanner (there is at least one