Encrypted firmware package for the DreamSky Openbox HD2 Plus receiver in RAR form, with the name truncated after V1 so the full version number is unknown. Its size matches another dated build of the same software, suggesting it may be the same release. Encrypted images are loaded through the receiver own update function rather than written raw to flash. Compare contents with other builds before use, confirm the exact model, and back up existing firmware so you can recover if the box fails to start.
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 @tvsoftwareworld. 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.