Hi guys,
Here is a bandaid solution, but it works. Below, I added an icon for Instagram by manually updating the header.php file.
<!--<?php /* Social Media Icons */ thinkup_input_socialmedia(); ?>-->
<div id="pre-header-social"><ul><li class="social facebook"><a href="https://www.facebook.com/" data-tip="bottom" data-original-title="Facebook"><i class="icon-facebook"></i></a></li><li class="social twitter"><a href="https://twitter.com/" data-tip="bottom" data-original-title="Twitter"><i class="icon-twitter"></i></a></li><li class="social linkedin"><a href="https://ca.linkedin.com/" data-tip="bottom" data-original-title="LinkedIn"><i class="icon-linkedin"></i></a></li><li class="social flickr"><a href="https://instagram.com/" data-tip="bottom" data-original-title="Instagram"><i class="icon-instagram"></i></a></li></ul></div>
</div>
Hope it helps! Just keep in mind that the social icons you setup in the Theme Options are now overwritten.