To download and run (specifically the recommended stable version 0.6.1.616 or the latest 0.6.1.655), you should use the USBHelperLauncher . This launcher is essential because the original software was discontinued and requires a runtime patch to function today. 📥 Download Links
Often recommended for stability, these can be found via the USBHelperLauncher Gist . 🛠️ Quick Setup Guide Download Wii USB Helper 616 zip
Can be found on TechSpot or FileHippo .