RAR archive of 2.70 MB with software for the Tiger T1 Mini Pro receiver, version 2.16 build 16537 dated 6 June 2016 according to the name. Updates for this class of box are normally installed from USB through the upgrade menu, and a programmer is only needed for a unit that will not boot. Unpack the archive to see whether it holds a USB update or a full flash image. Confirm the Mini Pro variant on the device label before using it, and save the current firmware as a fallback.
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.