hich Blender versions and systems are supported, and which ZIP should I install?

Only exact Blender 4.5.14 LTS or 5.2.2 LTS on Windows x64. Use extension 0.2.0 for 4.5.14 or 0.2.1 for 5.2.2. Download the matching standalone extension ZIP, or extract it from render-delivery-helper-windows.zip, and install only that extension ZIP through Get Extensions > Install from Disk. The complete bundle supplies the original example and Quick Start guide. Do not install the outer bundle or a Blender program ZIP. Other Blender releases, macOS and Linux are unsupported; GPU and customer production projects have not been tested.