There are two versions of the Extension. One that is compatible with Visual Studio 2013 and 2015, and a separate package for Visual Studio 2017.
Visual Studio 2017 (Updated 28th March 2018)
The Extension is in the form of a VSIX package and simply needs to be double clicked on to install it.
You can also get the utility from the Marketplace by using the link at the top of this page.
After double clicking it, it will show which products it can be installed to.