I recently purchase the Nissin i40 flash for my Sony A7Rii. I also purchased the Nissin Air Receiver and Air 1 Commander so I could do some OFF camera work. My readings said to bind the 2 requires the Commander and Receiver be updated to the latest levels. I sent both devices to the Nissin dealer and, I believe, all sorted. But, following the instructions, I cannot bind the two devices. does anyone have any idea how one does this. Any help would be appreciated