Hi Tim,
Go to the Flarm website and use the
configuration
tool.
Log in if you have an account, if not, it might be good to do so.
Enter data applicable to your ship. If I didn't know any better, I
used the defaults. After running the tool, the flarmcfg.txt file
was downloaded automatically.
Place the flarmcfg.txt file in the root of an SD card or USB stick
whichever is applicable to your device. Insert the device and power
on your device. After the configuration is complete, remove the
device. This should at least get you started. I found initially
that I got alerts on my own glider which was very distracting. The
fix was, IIRC, to go back to the default settings in the
flarmcfg.txt file.
That should get you started.
Dan