What I did was to export the modified tree as a 3ds file which I can load back in as an object for use in my scene.

You can??? What's the point of encrypting it, then?

I am so confused about what is and isn't allowed with these Cornu-trees. I'm glad they've reconsidered about allowing them to be saved, but we should be able to export them to other apps as well. That is what they promised with VueI, isn't it?