Zip package of about 13.6 MB for the SR-2000HD EXTREME receiver, carrying firmware V297 dated 8 November 2021. The larger size suggests several files, possibly images for different boards or tools, so unpack it and read any notes before choosing a file. Such packages are used for upgrades and for recovering receivers that no longer boot. Match the hardware to the selected image and back up the current flash chip with a programmer before writing anything.
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