This new firmware for the P3P also needs to be updated on each of your batteries. Not every update requires this, but this one does.
Load the .bin file onto your SD card again, and proceed exactly as if you're updating the firmware on the Phantom, using a different battery each time. You'll see the same sequence of beeps and blinking lights, except it happens much faster.
Then, after each successful update (steady green light on the gimbal), turn off the unit, check the status on the txt file (I delete the txt after each one, but I don't think that's necessary), reinsert the SD card, and repeat with another battery.
