Since OpenATV is open-source firmware, "downloading" usually refers to flashing an image to your set-top box.
You're looking for information on how to download OpenATV 6.4! openatv 6.4 download
Everything You Need to Know About OpenATV 6.4 OpenATV 6.4 remains one of the most popular and stable Enigma2-based firmware images for satellite, cable, and terrestrial receivers. While newer versions like OpenATV 7.x have since been released, 6.4 is often sought after for its proven stability and compatibility with older hardware and legacy plugins. Where to Find OpenATV 6.4 Downloads Since OpenATV is open-source firmware
The Official Nightly Downloads Page is the primary source. You can select your receiver's brand (e.g., Vu+ , Zgemma , Edision) to find the last stable build. openatv 6.4 download