The FLARM default reset configuration file can be automatically created at https://flarm.com/support/tools-soft...guration-tool/ by clicking on the "Factory default" button. It will email you a FLARMCFG.TXT file that contains the text shown below with the key command string (like Richard said above). Save the file to the root of a USB memory stick, insert it into the FLARM and power it up. Of course, then you will need to manually configure the FLARM for your ship.

################################################## ############################
# This configuration file must be text only and reside in the top directory
# of the USB stick, SD card or FLARM Tool.
# This configuration file must be named FLARMCFG.TXT
# If you wish to change the settings, you can revisit the online
# configuration tool at any time: http://www.flarm.com/
################################################## ############################
$PFLAC,S,DEF