You don't have to do a progressive update. Just update to the program that you want. Remember to reset your gains to default and reset. Some have said that 5.16 is solid, I'm using 5.26, but I'm flying a Octo and haven't had any issues. 5.26 is 5.24 with 50 waypoints. No need to go to 5.26 unless you want the waypoints.