Encrypted update for the Startrack SRT 750 Gold satellite receiver, carrying version 1.09.15749 from 22 February 2016 and stored as a 2.29 MB RAR file. Because the image is encrypted, it is meant for the built-in USB upgrade procedure, while a raw dump would be needed for repair with a chip programmer. Matching builds were published for other Startrack Gold models, so check that the device really is an SRT 750 before flashing, and do not interrupt power during the update process.
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.