I've got about 25 flights on my new M100 (no camera mounted yet) and decided to update my firmware. I downloaded both the DJI Assistant 2 and WIN driver. Then I tried to update the firmware following the M100 user guide instructions on page 48 (no gimbal - plug in above the aircraft indicator light LED). Here's a screenshot of the Assistant 2 which did not appear to recognize the M100 when I plugged the USB in: I tried pulling out and reinserting the USB connection to the M100, but the Assistant 2 remained the same as the screenshot above and nothing happened. Now the worst part: When I then shut it all down, and then powered up the RC and aircraft to just fly the aircraft with the old firmware, the RC is no longer linked to the aircraft. I tried re-linking them via the DJI GO utility as described in M100 user manual pages 39 & 40, but it does nothing - the RC indicator light shines green and the M100 indicator light LED blinks yellow. So, any advice on a fix? Alternatively, does anyone know someone in the Napa/San Francisco, California, area that could take a look at it? Many thanks in advance.