EDIT: This is not a tool to “play with”, the linked post is to read and im not loosing my time teaching every step, to you or anyone else, users must know what their doing and learn it, if they desire as this is their own task only.
The RAR package has a folder named (F)lash (P)rogramming (T)ool… this will answer to your edited question on the tool location.
(I don’t think I’m able to boot to uefi shell on this system to try the flash tool that way.) No option for it in bios after disabling tpm security at any rate.
Any help nwith error 368? Write protection in the bios space.