Is there a FrameForge 4 Demo?

Absolutely!

You can get it by signing up here!

The trial literally is the program with every available FrameForge feature with a few exceptions:

1. It requires that you be connected to the internet to run.
2. Actors cannot be made fully nude. 
3. Storyboards print with watermarks.
4. You can't install our expansion packs.
5. At the end of 14 days, your trial will cease working. 

Your files will be saved forever. If you ever purchase and unlock FrameForge, you'll be able to continue working on your project.