Package: mozo Version: 1.16.0-1 When opening the properties dialogue of a menu item mozo writes a .desktop file to ~/.local/share/applications (even if you make no changes and select 'Close'). As a result the application will no longer be an option in the 'Preferred Applications' menu.
To reproduce: * Install Claws Mail and set it as the preferred mail reader via Control Centre > Preferred Applications > Internet > Mail Reader * Open mozo (Control Centre > Main Menu) and open the properties for Claws Mail * Go back to the Preferred Applications menu - Claws Mail will no longer be selected, nor will it be an option. Selecting 'Revert' from the Main Menu window will remove all files in ~/.local/share/applications, and applications such as Claws Mail can then be set as a preferred application again. (Interestingly, if you follow the above steps Claws Mail will be the preferred mail reader again). This effectively means that mozo and the preferred applications function are incompatible: you can change the properties of menu items _or_ set an applications as a preferred application - but you can't do both. I'm using Debian Stretch with Mate 1.16.1 and the 4.9.0-1-amd64 kernel. Apologies if this bug has been reported already (I couldn't find any bugs for mozo). Thanks, R Rijkhoff