In my yahoo store editor, there is a category missing from the sidebar page navigation. how do i get it back?

the category is still in inventory and you can still browse to the page if you type the whole thing into the address bar, it's still there, but i don't know how to get the category to show back up in the side navigation!
Update: the website is there is supposed to be a page called "ballies & bands" if you browse directly there it's there
Update 2: Thank you for responding. however when i click on "EDIT" from the home page in store editor, I see "contents-elements" and "contents-format" but no just plain "Contents"

I haven't been able to find anyplace that lists out that nav that's on the left side!
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