Sorry to be such a PITA, but at this point I'm nervous about bricking it...
When I select your white.dfu, then press Upload, I get this message box:
Your device was plugged in DFU mode.
So the DFU mode Vid, Pid and Bcd will be put in the .dfu file.
Continue ?
Yes or No ? If No, what's the next step ?
Thanks,
Steve