Microsoft Flight Simulator 2020 © Microsoft Corporation. Livery Texture.AMEX  FSX default B737-800  was created under Microsoft's "Game Content Usage Rules" using assets from  Microsoft Flight Simulator X default B737 , and it is not endorsed by or affiliated with Microsoft.  See address for reference https://www.xbox.com/en-us/developers/rules
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This livery is  AEROMEXICO Airlines texture.AMEX for the  B73X Project FSX B737 conversion aircraft. Special thanks to FlightMan100  , ASOBO , Microsoft , AEROMEXICO Airlines ,   and Flightsim.to  website 

This is a Drag and Drop   files corrected