Vuforia UWP Export

Apologies this is a very basic question, from a very basic user.

I can successfully export my Vuforia document from Unity to a working android APK. Want to export a standalone app for my Surface Go.

Is there a decent guide available? The ones I've seen all appear to be out of date (all reference Windows Store and not the UWP).

Converting to Universal Windows Platform warns me that "Selected Visual Studio is missing required components and may not be able to build the generated project." - no reference to what is missing.

Running Visual Studio 2017 15.9.7

Unity 2018.3.6f1

Vuforia Engine v8.1.7

Many many errors when exporting from Unity.

Visual Studio only allows attachment to Unity, not standalone.

Clearly there's some basic knowledge I'm missing, a simple up to date guide would be very welcome, or link.

Thanks so much.