Have you tried asking questions on the Finale forum?
Much better and quicker than asking Finale direct
And the unofficial [I think]
I've been using Finale for over 6 years, and have made over 500 files, mostly SATB A Cappella.
It's always done everything I need.
Took a bit of learning at first. I can send choir members files, highlighting parts to play/print on their computer using the free Finale Reader.