Hey again Fabio,
Unfortunately the menu would have to removed manually, Appearance >> menus.
I suggest you create a new menu, and add only the pages you are planning to show.
I also noticed that you have not imported the slider yet, you can find it (CF Slider) in your download folder, under Sliders import.
For the footer, Please go to Appearance >> Theme Options >> General Settings >> Footer. and select 4 widgets.
Let me know if I could help. I would be glad to delete the mess the demo created manually if I had to, If you would like that please provide WP admin access and I’ll do my best to sort things out for you.