Modify default Ribbon

xlCompiler creates application which has default User Interface options. Several Tabs with commands for opening and saving changed data, formatting and printing.
Ribbon - Formatting Options
This is a very basic interface, off course, it is not enough for real application.
All elements in the Ribbon created by xlCompiler could be accessed through VBA Object Model. You can remove or hide Tabs, change order, translate elements to your language. Or just change captions on the elements.
All of these tasks are described in this section of the Help Library.