Need Help with Menu on wordpress

Hello, I am building my website using wordpress, I have found a theme that is exactly how I wanted!
Only problem with this theme is that it has it’s own Menu by default.
Every page that I create automatically is added to that menu.
I need to have pages that won’t show up on the menu…
The support of the theme don’t respond to my questions…
could you help me to find out how to remove pages from that menu?
the Theme’s name is Panoramica

You can use this plugin Exclude Pages Located Here : Link

Otherwise you can use the Menu on your Wordpress Dashboard just Under Appearance, You can Choose the Primary Menu and Which Areas to Include…