Has anyone managed to interface Sky Demon and MSFS ?

Yes,..very easily.

I use a small utility (payware), EUR 6.00, called MSFS Bridge. A tiny 1mb download and is a doddle to use. There is another utility called Xmapsy (payware), but has a few more features and therefore costs a little more. Both available from the online store called SimMarket. I don't know of any freeware utilities. With the paid versions, you will at least get your chosen utility updated.