There are two versions of the extension. We recommend using the release version unless you want to test something that is only in the beta version. While it is possible to have both versions installed at once, some functionality may not work correctly if both are enabled (Extensions > Manage Extensions) at the same time.
Get the toolkit from the Visual Studio Marketplace or by searching inside Visual Studio.
If you had it, the preview version should be uninstalled first.
Beta versions distributed via VSIX Gallery and MyGet are no longer available.
Once installed you can begin using the extension and should start by configuring it for the way you work.