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