Hi Bill,
Thanks for wanting to try out the latest version of Notation Musician!
If a trial version of Notation Musician was installed at any time in the past, you won't be able to reinstall it again after the 30 day trial period expires. You can, however, install it fresh on another computer and try it out there. Or you can install the trial of Notation Composer on the same computer as you tried out Notation Musician on. There are more tools available than in Notation Musician, but the first 6 tabs are the same:
Notes and Rests
Text
Staff Symbols
Expressions
Lines
Layout
ttfn,
Sherry