You are indeed replacing an existing file. Someone earlier posted the original if you want to switch back. Of course the easiest way to revert back is to simply reinstall the app.OK... I did read the first several pages of this BOOK! It seems everyone has been saying taht this "hack" is not replacing any files or file structure. But on my iPad Air 2 connected to a window 10 system... when I try to add the file through Itunes it asked to confirm replacing a file. Im running ios 8.4 and DJI Go. What gives? Sorry if this was answered somewhere around page 18.. there is just too much fluff here to read it all.