I just received an A119S running A119S_170622_V1.7.
I'd like to update to the latest available FW (V2.1, released 2017-08-17 and available at http://support.viofo.com/support/solutions/articles/19000047224-viofo-a119s-car-dash-camera-firmware), but I'd like to be able to downgrade again if it's...