We've been asked several times for a proper user manual than you can print out and read at your leisure. Finally, Moviestorm has become stable enough that we've been able to write one and not have it change before we've finished. 36 pages of it, in PDF format.
You can find it at http://www.moviestorm.co.uk/moviestorm/documentation/ (or click Documentation in the Web page footer).
Let us know if there's anything that doesn't make sense or which you think should be covered in future updates.