: Ensure your software version matches your hardware. V6.xx is standard for the older models, while the newer TL866II Plus uses the "XGecu Pro" software suite. Firmware Sync
For the TL866 series, software is typically provided by the manufacturer, minipro+670+download+top
Runs on Windows XP through Windows 10 (though newer versions may require compatibility mode). : Ensure your software version matches your hardware