Looking at the .system folder there are no files with an extension of .unl or .gma

there are only :
fs_image.ver
gmapbmap.img
gmapbmap.sum
gmapprom.img
gmapprom.sum
gmaptz.img
gmaptz.sum
locales.xml
TrafficProvider.xml

There is no garmindevice.xml in the garmin folder or it's sub folders, the only item in the garmin folder is a sub folder LEX_PKG.