Mobile version with width 1024px?

Hello. I’ve installed this theme but it seems that if the screen resolution is 1024px, the menu is changed into the mobile version, in fact the element with id “mainnav” turns its id into “mainnav-mobi” and media query “(max-width: 1024px)” is applied. I would like to change this so that if the width is 1024px the website is still considered in desktop version.
I have not found any option that allows to change this behaviour.
Adding custom CSS won’t work as there may also be some javascript that changes the things.
What can I do?
Thank you!

maybe have a look at this post?

Thank you!