Yongnuo YN600EX-RT ii firmware upgrade
Not sure if anyone else has upgraded the firmware on one of these flashes yet? I've downloaded the YN flash updater program, and the new firmware file. I've connected my flash to my computer with a USB cable, but nothing happens. Is there something I need to do on the flash to put it into USB mode or something? There doesn't appear to be anything in the instruction manual, or with the firmware software to tell you how to do it.