Generic setup package, 1.91 MB in ZIP format, whose name gives no model, brand or version. It probably contains an installer for a utility, such as a receiver upgrade or loader tool or a channel editor, but the contents must be checked after extraction. Scan the files before running anything, and read any included notes to see which hardware the program supports. Tools like these usually connect to a receiver over RS232 or USB to write firmware, so confirm compatibility with your unit before use.
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.