ASUS Maximus VI Gene archive in RAR format, 693 KB, with no revision number or content description in the name. The larger size than the other files in this series suggests more than one file or extra material, but that needs confirming after extraction. Boardview data inside would open in an FZ-capable viewer for tracing rails and locating parts on this micro-ATX board. A BIOS image would need the original chip read and saved with a programmer before writing.
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 @boardview. 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.
7-ZipWinRARThe Unarchiver (macOS)