Trial version too limited!

The trial version will let me do "Mary had a little Spam",
but says a simple 12 bar blues is "too long",
that is unless I register! FAT CHANCE! Too GREEDY, too
SOON! I'm looking for a FAST, EASY, program to print out
music for my guitar students, and don't mind paying for it,
but ONLY after making sure it will do what I need it to do!
Anyone know of one that works for melody, chords (including
rhythm ), and maybe tab? MIDI crap not necessary (it's OK
for "test drives" but not much else! Jim