I read with interest the discussion about whether the Alt+F4/X/Close should minimize to the tray or exit the app. I see both arguments.
Why not solve the problem by adding an option: Alt+F4/X/Close=Minimize. Selecting the option means minimize, not selecting (default) means exit. Where you minimize to, tray or taskbar, is already an option so all variations are covered. Of course clicking on "-" will always minimize. To prevent hacking causing unexpected reults I would suggect this option be stored in the db file, not the cfg.
This should make everyone happy.
Rob