Tested with WordPress 4.5.3. It definitely works. There's no admin shortcode or menu configuration but it simply changes all menus into accordion style menus.
vnoj said that this doesn't work and I can see why she says that.
This plugin comes with no admin menu item or any area to configure its settings. But if you follow the few quick and easy steps in the Installation link above it works.
Basically, just add the Pages widget to your sidebar and use that instead of your menu.
Voila. Simple. I like it.
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