Reset firmware to ARDrone 2.0

I have just started drone development and I am inheriting drones from a previous team. They followed the instructions in the ardrone_autonomy wiki for connecting multiple drones found here

The script that was ran on the drone seems to have altered some firmware properties on the drone dealing with the connection of the drone on startup. I can telnet into the drone still from the network it is connected to, but what I want is to disconnect the drone from the network and run it from the freeflight app. Is there any way to reset the firmware or re upload a fresh copy of the firmware to the drone via a connection over a network?