The "Standard" menu toolbar is missing in standalone
(i.e. File, Edit, Analysis, Components, View, Tools, Report, Help)
In the default workspace layout these menus are docked in the upper left corner of the standalone application as shown below.
Note: if you're using the CONNECT Edition or greater (10.00.XX.XX) the menus will look different. Please refer to the Ribbon wiki or Ribbon help documentation for more information on the new menu layout. If the tools at the top of the drawing pane are missing (scenario dropdown, selector, pan, zoom tools), see this article.
By clicking on the handle to the left of the menus and dragging, these menus can be undocked, or moved and docked to a different area of the application window. The Standard toolbar (with the File, Edit, Analysis, etc menus) can't be closed (display turned off). So if you do not see it, most likely it has been moved somewhere, possibly off the viewable area of your screen.
Note: again, this only applies to V8i and V8 XM. For the CONNECT Edition, the Ribbon is used.