Attempted to update FM 6.4.1 to 6.4.2 from within the 6.4.1 app using the “Software Update…” menu option. Once the app is downloaded and tries to install, it comes up with an error. I tried three times in a row and kept getting the same result.
I then went directly to the FM webpage and downloaded the 6.4.2 updated version as a stand-alone .zip file. It unzipped successfully and the 6.4.2 version from that seems to be working correctly.
Just an FYI heads-up. Your mileage may vary…