ZIP archive of firmware for the Star-X C99 WiFi receiver, dated 28 September 2016; WiFi most likely marks the edition with wireless support. The name states no version or chip type. At 2.81 MB the package suggests an upgrade file, not a raw SPI image. Make sure your C99 is the WiFi edition before applying it, because the Laser edition has its own build. Unpack and check the contents first, keep power stable while updating, and keep a backup of the existing software for recovery.
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 @tamirkaran_chanel. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →