Go to the admin panel.
Setup -> Navigation -> Public Navigation
Press on the upper right "Add navigation".
Place your settings and don't forget to chose your parent navigation entry.
I think he want to know WHERE to find the code/css to change color and icon....
I recommend to learn a bit more english for online business....it's essential...
4.1.8. UP is a bit misleading as it blows up any 4.2.x version. Hope there comes soon the new version that's compatible with 4.2.x.
So for now only 3 stars bcs the star rating is required.