Howdy Craig,
Notation Player is a free player (similar to Acrobat for pdf files) - it plays files that are already set up, but does not have editing capabilities.
I think you may be referring to Notation Musician, which has all the above capabilities and much more for transcribing and arranging sheet music from .mid files. You can get the trial version (fully functional for 30 days) at
www.notation.com/Download.htm
Have fun!
ttfn,
Sherry