I'm using Finale v. 22.214.171.1243 on a Mac running Catalina v. 10.15.7. Until recently, I was able to log into Finale, open a .musx file, and export it as music XML using the dropdown menu: File -> Export -> MusicXML...
In the last week, when I try this procedure, nothing happens. The MusicXML command is _not_ grayed out.
Perhaps related (?), every time I run Finale now, I have to enter my serial number to re-authorize my version.
I tried deleting the Finale preference files in 2 ways (using the Preferences menu from Finale and deleting them from the Mac Preferences folder), but that didn't solve the problem.