With AllowBypassKey = True you should be able to access the Nav Pane. If one or more of the DB's is not displaying the Nav Pane, go to the options in that DB.
You can hide the Nav Pane using options. Right click the Ribbon and choose "Customize Quick Access Tool Bar". Make sure you right click empty space on the ribbon to get the correct options to display. Once the "Access Options" window opens, select Current Database and look for the Navigation section.