1. To replace social icons goto Theme Options > Header > Header custom HTML and Static Blocks > edit your footer static block.
To get VC editor shown for static blocks go to wp dashboard > Visual Composer > Role Manager > Post Types > Custom > tick “static blocks”.
2. Please disable demo footer blocks in Theme Options > Footer and add your content in Appearance > Widgets > Footer Copyright and Footer Links.
Feel free to ask if you have any other questions.
