Correct me if I am wrong, but is there really such a thing as a "file version" of boot.efi?
Yeah, maybe my wording was not completely adequate. By "version" I meant something what differentiates one from another. It could be creation/modification date or something more unique to the file like MD5 hash.
Someon skilled in programming could decipher this mechanism (if it exists ofc ) by examining updater package. But this is beyond my skills.