I was having issues too. I contacted Finale and the instructions below made everything work better, except for the resolution, and you might just try the resolution "solution" first, so I'm highlig...
Thank you Mike Rosen.
I'm finding it difficult to follow this thread. At the risk of asking a redundant question: My Finale 25.5 is excruciatingly slow since my recent Mojave 10.14.1 upgrade. Will reinstalling Finale 25...