The aircraft editor is not fit for purpose. It corrupts anything it touches and is never up to date with the latest changes in the flight model and config files.
It's clear this tool is not used internally at Asobo. Open config files from the planes that come with the sim, and it will corrupt them in most cases. The only way I have found to avoid corruption is to edit an aircraft's files exclusively within the tool, but that isn't an option when the editor is missing every new parameter that came in the latest sim update.