How it works for me:
Select the Documents list, then click Edit, and there will be five organizing tools (add folder, duplicate, etc.)
If that doesn't work, try force-quitting your application. Click the Home button to return to the Home screen. Double-click the Home button to go the row of recent apps at the bottom of the screen. Click and hold down the Adobe Reader icon and the red "delete" icon appears. Click the delete icon and Reader is removed from the list. Return to the Home button and relaunch Reader.
Europe, Middle East and Africa