The update seems to be working fine, but I received some errors. I wanted to share this feedback so that it may help.
-> Installing to: /opt/FreeFileSync
-> New console command: freefilesync
-> Registering file extensions: *.ffs_gui, *.ffs_batch, *.ffs_real
/usr/share/mime/packages/resolve.xml:9: parser error : Extra content at the end of the document
<mime-info xmlns="http://www.freedesktop.org/standards/shared-mime-info">
^
Failed to parse '/usr/share/mime/packages/resolve.xml'
Error in file "/usr/share/applications/org.kde.kdeconnect_open.desktop": "*/*" is an invalid MIME type ("*" is an unregistered media type)
All done!