I'd definitely recommend moving your save folders between updates. That said there is a small chance that I start using different plug-ins, and in that case the saves won't transfer correctly. I'll be sure to let folks know if I do that though.
For the files, if the size gets too large I'll probably get a MEGA account and host the download there or something. The more steps involved in the deployment process, the more likely I am to fuck something up lol
I'm pretty set on the themes for Sloth, Wrath, Lust, and Gluttony so I'll be sticking with what I've got. Some vore might bleed over into Greed, though, we'll see!