Software archive containing Directory Opus version 13.17.9335 for 64-bit Windows from GP Software, 26.6 MB in RAR form. Directory Opus is a file manager replacement for Windows Explorer, useful for sorting large libraries of dumps, schematics and boardviews. The CRD tag suggests a modified release rather than the official installer. Such packages can carry unwanted code, so scan it with antivirus and run it on a test machine rather than a workstation holding customer data.
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 @laptopschematics. 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.