I have an IDEA7 project which I opened in IDEA 9.0 Community Edition. It has 20 modules defined in the project structure but only 7 of those modules are displayed in the Project view of the Project toolwindow. There are no error messages in idea.log. Files and classes in the undisplayed modules are accessible through Goto Class (Ctrl-N).
How do I get all the modules displayed in the Project view?