I am unable to change menu items in MotoCMS 3, is there something wrong in my installation?

MotoCMS Version: 3.2.12
Theme: Natural Foods Version: 1.2
https://www.tribalfoods.ie
Installed on own server.

I have made a few cosmetic changes to colour and getting familiar with the CMS but I cannot figure out how to amend menu items. Anything I can find (not much) tells me to go to Design -> Wdigets -> Menu and on the right hand side but I do not get one. All I can do is change the colour scheme. 

Could someone please tell me what I'm missing, I have worked on many WP and Joomla sites before so this one is puzzling me.

This link is the only one I could find to show the menu item edit in action https://www.ostraining.com/blog/motocms/customize-a-motocms-template/