Intel CSME System Tools for firmware 14.0.20 and later, revision r16, packed as a 17.0 MB RAR archive. The plus sign in the name indicates the kit is meant for 14.0 firmware builds from 14.0.20 onward, distinguishing it from the earlier 14.0.11 package. Inside are utilities such as Flash Image Tool, Flash Programming Tool and MEInfo for building, flashing and diagnosing the ME region. Check the exact ME build on the board before choosing this set, and back up the SPI flash before any write.
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 @bioshub. 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.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →