As stated above, it depends on the last version you used. Some minor stuff would be the naming of the material room I think it was basic and advanced to Assign and Edit. I never used basic nor do I use Assign. The Addition of Layers is new-ish. And of course the Superfly nodes. There have been some tweaks to UI scale, but that's still a bit hit or miss. You are also greeted with an option to load previous saves, or preferred states on launch, which is rather useful. The current version of Poser 13 has very quick Superfly render times on photoreal renders with Optix settings, even on an old RTX 2070 card. Measure in seconds not minutes, or days with Firefly. I do hope you return Letterworks, your products are fantastic.