This theme has two widget areas. One is for the blog sidebars and one is for the footer. Go to Appearance > Widgets and you’ll see them both. You’ll also see that this theme doesn’t have any special widgets, because all shortcodes can be used as a widget.
To do this, just insert a text widget in any sidebar and paste the shortcode which you want. For example, this is how the online demo’s footer is set up:
[krown_social facebook="#" twitter="#" behance="#" dribbble="#"] Copyright 2013 © Huge.
Just like this (inside a text widget), you can configure the sidebar’s footer however you want.