I have a DSO201 made by minidso that I bricked by trying to upload their own firmware to it 
In my quest to return it to a functional state, I downloaded the the zip file (BenF364_LIB353) and extracted the two files (V353_LIB.HEX and V364_APP.HEX). I connected my unit via the USB cable and powered it on in DFU mode. An icon titled “DFU V3_29_D” appeared under My Computer. I copied the V353_LIB.HEX file to the root folder of the device. Then I copied the V364_APP.HEX file to the root folder of the device. It disconnected and remounted and after that the two files showed as V353_LIB.RDY and V364_APP.RDY. I powered the device off, disconnected the cable, and powered it on again and now all I have is a flickering greyish screen. If anyone can tell me what I did wrong, I would be very appreciative as right now my DSO201 isn’t even a very good paper weight.
-Thanks