You get the latest version of OpenXR via the MS Store and then under the Developer tab, you enable you want to use the latest preview. After enabling that, close OpenXR and then restart it and you should see the latest version.
@mbucchia So happy to tell you I still haven’t had a single CTD caused by PreceptionDevice_unload.dll using the latest preview version of the OpenXR API. Now that it seems (fingers crossed) you finally how to fix this issue, would you care to share what the actual culprit was causing the CTDs we had?