ZIP archive of about 4.89 MB for the StarTrack 300 HD Plus satellite receiver, with the code 10030500 and a g suffix in the name, likely a build or hardware identifier. The contents are presumably the firmware or update image. Technicians use it to reflash a receiver that no longer boots or misbehaves after a failed upgrade. Compare the board revision and flash chip with the package, make a readout of the original memory beforehand, and confirm the image size fits the chip.
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 .zip file
Compressed archive that every operating system opens without extra software.
Built-in OS tools7-Zip