Unreal Engine 4 is available for Win10 UWP app dev now

When I try to add a reference to the DLL projects, VS complains that different platforms are being targeted:

7f9dbc9dc05808eda45af8863babf30646a3c6f4.jpeg

But each platform is targeting x64:

44ca9e5646b6534195dc7709c60c1119c34c925e.jpeg

6bfef8beb50bc62051d85701bd8b6a90409b954b.jpeg

This may be trivial, and I’m trying to resolve it now, but as usual, any help/guidance you can provide is appreciated.