The "Download Vircadia" sections lists both the installer and the launcher. However, the "Windows Install" section only mentions using the installer.
The "Windows Install" section should include what Start Menu items are installed - for both launcher and installer - so that people can find them subsequent to the install step.
The "Upgrade Vircadia" section doesn't included how to upgrade using the launcher as opposed to the installer.
https://docs.vircadia.com/explore/get-started/install.html