I have created a project using the Windows XR Plugin and XR Plugin management. I am NOT using the XR interaction toolkit, I have created my own tools, including my own XRRig using the Tracked Pose Driver. My project is NOT built with UWP since I need file access that UWP does not provide or is too tricky to provide (after much attempts and work with senior developer here, I just gave up). So I'm using standard Unity and my build settings are "PC,MAC,Linux stand alone". My Player settings in the XR Plug-in management are "Windows Mixed Reality". Now, once the build is built, I obviously don't see it within Steam, but it also does not appear in the Mixed Reality list of applications. I have to start it manually by clicking on the icon on the desktop. wtf... I know for applications to appear they must be UWP, but then if this build is neighter UWP nor Steam, what is it then? How do I add it (or sideload it) to the Mixed Reality applications that the Windows menu brings up within the cliffhouse for e.g.?