I get an error 43 message when I use Build, Places to delete unused Places. I have Version 3.0, and I suspect that I have reinstalled it after a computer crash without 3.1 which as I remember was a download. How can I get 3.1 and what do I do about error 43. The manual says to go to Utilities, Preferences, and then Desktop Preferences. I don't find Desktop Preferences as an option.