Firmware release v1.11 for the Openbox S3 receiver, built on 30 May 2016 and packed as a 3.46 MB ZIP. As an early build it is mostly useful for downgrading or for restoring a box to a known older state when later versions behave poorly. Check the model identity before installation, since S3 and S3 Micro images are not interchangeable. Save settings first, follow the loader method that suits the unit, and keep the receiver powered without interruption until the flashing finishes and it restarts.
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.