Can Xamarin forms be used to make windows application?

Client asked for an application to run on Ios/Android/WindowsPhone. We proposed to use Xamarin.Forms. We are now facing the problem of Windows. The client asked if it's possibile to convert the app from mobile to desktop without using the windows store.

This application will be used on multiple pcs ranging from windows 7 to 8.1 to 10. I was wondering if it's possible to direct export of the project from Xamarin forms.

Thanks.