Thanks for trying, sorry it’s still not working.
With the driver provided you shouldn’t need to use the Microsoft App Store version of the Thunderbolt utility, rather, you should now be able to use the legacy utility that should have been automatically installed alongside those drivers.
To better assist with this kind of issue we’ve been working on a page to document Thunderbolt 3 authentication processes. While not yet fully completed, it may serve as a helpful tool in this situation: https://plugable.com/tbt3auth
I’d take a look at the first section titled “Legacy Thunderbolt 3 Authentication (non DCH Thunderbolt 3 drivers & Thunderbolt Utility)”. We also have an accompanying video.
It’s possible that your system may also have a mix of drivers which can cause issues:
So far, we’ve had the best experience with the Legacy drivers and app which is why we’re recommending the legacy solution.