If you install the USB driver on Windows you can see the firmware revision in the FOCAL ARCHE Control Panel it installs:
v6.CA is the factory firmware, v6.CB is the July 2020 firmware.
If you install the USB driver on Windows you can see the firmware revision in the FOCAL ARCHE Control Panel it installs:
v6.CA is the factory firmware, v6.CB is the July 2020 firmware.