responsive width changing

Hello everyone,

In this files I changed the width from 767 to 1199:
style_responsive.css line 14
style.css line 601, 620, 662

with no success.... No changing of anything.

The jux mega menu is installed on a Joomla 3.4.3 site. I changed the template to protostar for testing but here is the same problem.

It is certainly not sufficient to change only line 14 in style_responsive.css like shown in the video of another thread here.

Do you have any solution for me?

Regard Ingrid

Found it out!
You have to make the changes in the file /includes/css.php
Line 64 and line 114

Regards
Ingrid