If I have two windows open, one on each monitor, if I make a change to the font in a text block on the "non-primary" monitor, Finale 25 immediately quits. This is reproducible. However, if multiple documents are open on the main monitor, behavior is as expected.

Your pal,

Steve Alper

MBP Retina (mid-2012)

OS 10.12.3

Finale 25.2.0.79