drone recovery

My Plus controller got caught in a loop during boot and repeated attempts to resolve it failed. It was obvious the FlightMode app was corrupted. However, it can't be reinstalled unless the ST16 is booted. Thanks to @Haydn and @Peggy for several suggestions, I was able to find a method of getting...

Any advice to recover a lost drone would be appreciated. Went outside my house and flew over my neighborhood for practice and was about to bring the drone back from a couple of blocks away. I switched to home since I saw battery was getting low and it was in my sight. Suddenly the receiver drops...