From the Wiring thread about the last beta:

Compatible with SweetHome3D 7.2 and Pan 3D View 4.0 beta.
Requires Pan 3D View 4.0 beta or later.

I don't know if the MS app store offers the latest version of Sweet Home 3D (I don't have any Windows machines so I can't verify).
It would help Daniels118 if you can confirm that you have installed Sweet Home 3D version 7.2 AND the Pan 3D View version 4.0 plug-in.