I've been working with the latest V26 on both windows and mac.  There seems to be a problem with Jabb brass.  It would be nice if the 'jazz band' template from the setup wizard used the jazz font, or if the Broadway font was recognized by HP.  If you're trying to do a trumpet fall off or doit you need to used the articulations from the jazz set.  Putting that aside, I did get the fall offs to work correctly but the problem is, once you trigger a fall of (release controller 15)  you can't put in a mute expression and have it do the keyswitch for the mute.  The mute works fine if you don't have the release trigger preceding it.  I did get the mute to finally trigger, but it was about 10 measures after where I put the mute expression.  I have the latest of everything, Aria player, engine, Finale V26.1.  I'll have to see if maybe a newer version of JABB will fix it.