As long as you have access to all of the menus...
Close the initial form and then Click on the Tools menu, then StartUp.
Change the Display Form/Page to (none).
Close the database.
When you re-open it will open to the database window.
Last Resort solution: Create a new blank database, and from the tables tab,
Click Import, Browse to the old database and select all of the tables, forms,
queries, etc.
Hope this helps.
jmonty