Version 16.0.15.1531 of MFIT, the Intel Flash Image Tool, distributed as a 14.8 MB Windows program. It is an earlier build within the CSME 16 toolset and opens full SPI images so the flash descriptor, Management Engine and BIOS regions can be examined, modified or regenerated. Repair shops rely on it to produce ME-cleaned images for boards that fail to boot after firmware corruption. Pick a tool build that suits the platform's ME version, and keep the untouched dump before writing a new image.
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.