How do I set the device back to factory defaults ?

Look for the "Defaults" button in the configuration page. This procedure will NOT erase the network settings.
To revert ALL settings (including the network settings, passwords, etc) to factory defaults the “Reset” button has to be pressed for about 10-15 seconds (depends from used firmware, changes LED blink code when ready) while the Barix Instreamer is powered. Use this method if a connection to the Barix Instreamer cannot be established. If this fails we recommend to perform a “Serial Rescue”