I just installed an update to the Multi-level Navigation Plugin for WordPress on one of my sites and was briefly confused when only one page was showing up in the menu. Turns out the page I had set to ‘exclude’ got switched to ‘include’ so it was only displaying the page I wanted to be left off of the menu.

Easy fix. Just go to your Dashboard and select Settings>Multi-level Navigation Plugin. Under the Menu Contents page, scroll down to the Modifications section. Just review your settings where it says ‘Pages to include or exclude in the main menu’. I just had to change the dropdown from ‘include’ to ‘exclude’.