Packed in a 4.86 MB RAR, Intel Flash Image Tool 11.0.0.1173 is an early build of the version 11 FIT. The program takes an SPI flash image apart into its descriptor, ME, BIOS and optional GbE regions, allows editing of ME and descriptor options, and builds a fresh image. In repair work it is mainly used to replace a corrupted Management Engine region with clean firmware. Check that the ME firmware in your image is from the 11.0 line, make sure the built image matches the flash chip size, and back up the chip first.
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.