The upgrade tool requires a minimum firmware of ORB400L_V1.1.5BVZRT.
My device is running ORB400L_V1.0.4_BVZKJ. Firmware update process does not work either, directly on the device UI, or in the web UI. I've restored to defaults several times, and rebooted several times. No updates are recognized.
What is the direct download link for ORB400L_V1.1.5BVZRT