Hello John!
I doesn't seem to me that you are missing something.
I would try to delete the follwoing Finale preference files:
username\Library\Preferences\com.makemusic.finale.fprf
username\Library\Preferences\com.makemusic.Finale.plist
The folder username\Library is hidden by default. To get access, go to the folder username. Then choose Go/Go to folder and enter “Library”.
I would backup these files somewhere else before deleting them, because you might loose some settings.
After removing the files, I would restart the computer and then let Finale rescan the plugins.
If this doesn't help, please let me know which OS you are using.
Best regards,
Andi
Vienna Symphonic Library