Is there a way to add sub-menus to the Easy Blogging plugin menu items?

On the Menu Items for the easy blogging plugin, i dont see anyway to add sub-menu items to a "parent" item.

For example -- if i want to have the menu item "Themes" open up into a few sub menu items that read "Manage Themes" "Free Themes" & "Premium Themes", can i accomplish that with the current options of the plugin? I want this option obviously to conserve space, so only when the user clicks on "Themes" will it then open and display the 3 Sub-Menu Items to choose from for themes.

Looking forward to your response.