Pcm erased, when another program inserted now truck does nothing, what to do?

What is your question?

2011 Dodge Ram 2500 Diesal MegaCab. My son inserted a device/program into truck to "calibrate" new tire mpg. when inserted , screen displayed to turn truck off, when did so, everything gone, truck wont even go into neutral, lock! Had to have it towed to dealership who wants to charge $4500 for new pcm? Please Help?