The Main Menu is no longer the primary way to access Aspen features. The File and Tools pull-down menus have replaced the Main Menu in this capacity (the Main Menu is identical to the File Menu).
Once you have displayed market information on the screen, you use application menus to fine-tune the information on the screen. Application menus are specific to the window you are working with.
If the Aspen desktop contains no windows, pressing the ~ key, or right-clicking on the desktop displays the Main Menu.
If the Aspen desktop contains one or more windows, right-clicking in the window or pressing ~ displays the application menu for the active window.
If the screen contains one or more windows and you want to display the Main Menu, Shift + ~ keystroke displays the Main Menu.