Social media icons

Hello,
You have to make child theme and do changes inside it.Making a child theme means your changes won’t be overwritten when you update the theme. If you’re new to child themes, you can explore these guides:

http://codex.wordpress.org/Child_Themes
http://vimeo.com/39023468

Alternatively, you can make child themes using plugins:https://wordpress.org/plugins/one-click-child-theme/

To make change/update use Ftp-filezilla.
Watch https://www.youtube.com/watch?v=xzxGVaoG2CY

Copy 3 files with their parent folders, author-social-icons.php, social-icons.php and customizer.php into your child theme
Now add the social icons you need in all the three pages searching for social icon on the files.

Reply me back if you have any problem.