I deleted the exported zip file that was placed in my exported templates folder and of course it still shows in Visual Studio\'s \"Add New Project\" dialog. I expected that but
If you still see the unwanted templates displayed in the New Project... dialog, you have to delete (for Visual Studio 2013 Community) {program folder}\Common7\IDE\ItemTemplatesCache\cache.bin after deleting all the unwanted files as described above. Afterwards VS will rebuild the templates listing.