@lymond
I think since the Nobles Club saves are posted as worldbuilder files, it doesn't matter if you are running 3.19 and play games created on previous versions. You can test this by trying to go back all the way to the beginning few games.
As for MODs, I use BUFFY. Most people used BUG before BUFFY came out, and I'm sure there are a few others.
But again, it doesn't matter what MOD you use because these are worldbuilder files, so put them in your saves/worldbuilder folder and 'play custom scenario' after you've loaded the MOD you want.
If you are asking about the MOD thing because you want to post your game and ask for advice, then I'd say no mod or BUFFY. But a good group of pictures will usually suffice for people trying to give you advice.
cas