To successfully open these files, you must use a dedicated extraction tool rather than the built-in Windows or Mac zip utility. Recommended software includes: 7-Zip (Free and Open Source) 📥 Step-by-Step Download & Extraction Guide

You likely haven't downloaded all parts, or one file is named differently.

Place all downloaded parts into the on your computer.

Right-click the .zip file and select Extract Here or Extract to [Folder Name] . Automatic Processing

Ensure the filenames are identical (except for the extension).