I haven't used Lightroom for awhile and I'm trying to finish a phonebook I started. I finally figured out that the list of modules that is usually along the top right is missing on my screen (Library, Develop, Map, Book, etc.). The only way I can select a different module is to go to 'Window' and scroll down to the module I want there. How can I get these to show up again? It's just black space where they're supposed to be.