RAR archive, 6.68 MB, with Intel FIT version 13.0.37.1556, a later release in the 13.0 branch. The Flash Image Tool lets a technician load a full SPI dump, inspect region boundaries, insert a clean ME firmware and rebuild the image with adjusted descriptor settings. It is often used when cleaning ME on boards that boot poorly or show ME errors. Match the tool to 13.0-series ME firmware. Keep the original read of the chip, and check that the output image size matches the flash before programming.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @mfittool. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.