Hidden Pages???

Hello, is there a plugin or hack that allows pages to be hidden so they do not appear on the liewcf.com navbar…Here’s my problem, I am trying to incorporate one of the wordpress stores on my site, but the store immediately adds pages to the nav bar on my site. I can go and delete the pages that the store creates, but as soon as I add a new page it will go into the nav bar. I’m sure there is a remedy to this. Please help.

look here

https://www.thepolishambassador.com