The main menu is placed in the bottom right corner of all tabs. In the first tab, called Start, you also find it, with a different layout but the same sub-menus, in the top-right corner.
In settings, you can manage your license, set the code generation folder, and view the ratings.
Some local menus only show up if you hover over their area. E.g, the parameters, request bodies, responses. The following is an example of a hover-over local menu of a parameter