The Tray icon provides a quick access to some of the program functionality and serves to notify you of any significant changes taking place while the program is running when the main program window is minimized or hidden behind other windows. To configure the program behavior regarding the System Tray, click the Preferences button from the Application Menu and switch to the System Tray preference page using the corresponding link on the navigation bar to the left in the Preferences dialog within the Miscellaneous group Pic 1.
If you prefer the program main window to be minimized during the program start, you should check the Minimize on startup option.
The Show program icon in System Tray option allows you to choose if the program icon should be shown in the tray. If it is enabled, you may also specify if the program should be hidden from the Windows taskbar when it is minimized to System Tray, and if the main window should be restored from the tray with a single or double click.