I am running the latest version of DJI Go for my Advanced 3 and will shortly be taking ownership of the Mavic. Reading the Mavic user manual I need to download DJO Go 4. Slightly confused as the very front screen of the existing Go app has the Mavic on it. So basic question; I assume I need the Go 4 app for the Mavic and use DJO Go for the advanced 3.