Note - Deleting/Moving this file will loses the ability for you the plane to retain any of your selected options
I suggest you copy the file and move it to your desktop, and then go into game and select the options you want. Then edit the file using the guide at the bottom.
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[Short version] - Select Livery>Config>Plane Registration>LiveryConfig.cfg - move file
Find livery in community folder
How to find community folder for steam C:\Users\[your_username]\AppData\Roaming\Microsoft Flight Simulator 2024\Packages\Community
Pick the livery i want
The plane registration matches with the file name
open the file
open this, and then keep opening until you see this
move the file to desktop
and the config is unlocked
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Edit those values to either 1 or 0 and look at pages 37-39 of the inibuilds manual here ini a350