Your Scoro site has one customizable menu. You can pick and choose the items you wish to see on the menu.
Go to Settings > My settings > Menu and just drag and drop things (like Calendar, Tasks, Reports, etc) to the menu in the order you want them to appear. You can also choose to leave things out from the menu by dragging and dropping them to Not in menu.
The items that are listed higher in the menu list, will appear on the header menu, the others under the dropdown menu. The header menu is dynamic and fits around seven items, depending on their length.