I upgraded from JNGP 1.5 to 2.0, but it still worked after that as I upgraded like 2 weeks ago. I got some errors when loading my map a few times saying I need to insert the disk but those never did anything before and could always be dismissed. It happened less than a week ago, that's for certain, because I remember checking the differences between Thralls hut and a regular barracks model not too long ago.