Kindle dp75sdi (UUU mfgtools 3.0) SE Blank MEGREZ

Hi All,
Attachment 214347
Pardon my ignorance, I am new to this and from a non-tech background.

I have a kindle dp75sdi (which looks like it was paperwhite), and I am trying to recover it. It is shown as
SE Blank MEGREZ:

Product ID: 0x0063
Vendor ID: 0x15a2 (Freescale Semiconductor, Inc.)
on the mac terminal.

I downloaded the UUU took and the tool is able to recognize it. I am now wondering where can I find the uboot.imx file :(

This is where my knowledge ends. Please help a old man out.

Thanks so much in advance.

Attached Thumbnails