Quote:NirExt is an old application by NirSoft that adds three new context menu options to Windows' default file manager Explorer (Windows Explorer or File Explorer).

Just download the application from the Nirsoft website and run it with elevated rights after you extracted the archive to the system using a program like Bandizip or the built-in unzipper of Windows.

It is necessary to run it with administrative privileges as you will get an error message otherwise as elevated rights are required to manipulate the context menu of Explorer.

Tip: Check out the reviews of following free applications that add options to the context menu: Context Menu Tuner, Easy Context Menu, and Ultimate Windows Context Menu Customizer.

Full reading: https://www.ghacks.net/2018/12/03/nirsofts-nirext-adds-options-to-windows-explorer/