I did a firmware update and now my remote does not link with drone. I tried the factory delink process of pressing c1c2 and the video record button at the same time til I get beeps. The remote indicator light goes blue but when I press the link button on drone with a pen for 2 seconds nothing happens. Any advice? Also DJI assistant on my Mac OS Sierra won't let me log in. My keyboard has no connection or makes any input. Very frustrating. Spent 8 hours trying to troubleshoot.