A few more questions / possible bugs I noticed while playing around
1. The theme doesn't appear to be IE8 compatible.
2. Opening the mobile menu and selecting an option forces the page header down the height of the menu. Here is an example of a height element being added to HeaderMenuParent on my site:
margin: 0px 0px 25px;
This may be fixed as I cant reproduce it on your demo site?!?
3. This may be a newb thing with me and your themes & plugins, but if in the nopMegaMenu settings I uncheck "Enable Responsive Menu," the main menu still "responds" to the client size and switches the the "= Menu" option. At that point the app is broken since the Mobile Menu (properly) doesn't load. I would think disabling the responsive menu would cause the menu to stay the same regardless of client size?!?