I exported a single player mission and tried to play it in the new scenario option. I can see my mission in the scenario list, but when I select it and try to play it, it doesn't load.
Also installed the latest, v.50, single player version of Whole Lotta Stratis. Again I can see it in the scenario list, but when I select it, it doesn't load.
I can load both of these into multiplayer and play them (LAN option) fine.