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

Always verify the source of script downloads to avoid potential malware bundled in compressed archives. Need to open, create, or convert a RAR file? - WinZip

Ensure you have the full .rar file downloaded to your local drive.

To download and manage "Nople Script" or similar compressed archive files, you generally need to use decompression software to extract the scripts before they can be used. How to Handle .rar Script Files