To use the tool, you must establish a physical connection between your PC and the STB:

STB Upgrade Tool (also known as "STB Burning Tool" or "USB Burning Tool") is proprietary software developed by Amlogic and other chipset manufacturers. Version 40.2 is a refined release that offers:

Ensure you turn the STB power on after hitting start in the software. Where to Find the STB Upgrade Tool Ver 4.0.2 Link?