Pardon my cynicism but, this whole thing looks sketchy to me. Like many folks, I long ago installed a 7th channel lever in hopes one day DJI would enable it with a software update. Well, I've done everything recommended and it won't work I haven't done the side-loaded rar file, but that's a hack and I shouldn't have to do that. The other piece of this that is really irritating is the whole "battery upgrade" nonsense. I strongly suspect this was a clever way for DJI to eliminate the use of all the after-market batteries and force you to buy their premium priced ones. I mean seriously, WTH does this update actually do. Plus, the newest software won't update the battery at all but if you did it on the previous version as I did with one of my batteries, guess what? The other battery won't work until you "upgrade" it. The bottom line to me is this thing was poorly rolled out, even more poorly documented/tested and at the end of the day won't even do the one and only thing I really wanted; THE 7TH CHANNEL! Thanks for nothing DJI. Next time I'll think long and hard before installing one of these BS updates.