Hi Zhao,
I believe that information may be incorrect. Please look at this very recent information from the Microsoft guys at Windows.com

MIDI Enhancements in Windows 10

In here, they specifically state the following:
“When paired, the Bluetooth LE MIDI peripheral will show up as a MIDI device in the device explorer, and will be automatically included in the UWP MIDI device enumeration. This is completely transparent to your application.”

I believe the problem may just be that the Xkey Air is failing to pair with Windows. It looks like if the Xkey Air could successfully pair with Windows, it would just show up as an available midi controller in my Studio One DAW.

Possibly the Xkey’s Bluetooth firmware needs to be updated to have it successfully pair with the latest Windows 10?