This is true ONLY IF you use Piaware image.
If you use Raspbian image, and install dump1090-fa by JP script, or the method I have posted above, then dump1090-fa configuration is NOT controlled by Piaware.
In case of package install by JP script or the method I posted above, the only parameter which Piaware (if installed) will over-ride in settings in files
/usr/share/dump1090-fa/html/config.js is latitude and longitude. If Piaware is not installed, then latitude and longitude in dump1090-fa’s above noted config file will be valid and used.