From a few google searches with demo scene podcast I see many resources for demo scene music. The documentary by mole man and a few talks on YouTube. Came across this resource that has a ton of stuff.
http://www.metafilter.com/114704/Demoscene-The-Art-of-the-Algorithms
Is graphics programming something that people don't talk about generally?
The idea is that you can try and explore the demo effects in the editor. For example how a android in a shader works. The shader is included and most are just a big shader. It's one of the few program where you have a use for some strange post processing effect that didn't fit in the demo you just made. The only extra you get with a key is the 10 extra scenes to the 115 you get for free. The software isn't crippled in terms of what a scene can do so you don't get anything extra at all if you just want to use it for experimentation. Then your better of just using the free version. Try to redo the fire effect if you want to. Its 3 lines of pixel shader code and a gradient.