In _header.inc.php remove:
<!-- Social Share Icons --> <link rel="stylesheet" type="text/css" href="<?php echo SITE_THEME_PATH; ?>/frontend_assets/socialsider-v1.0/_css/socialsider-v1.0.css" media="all" />
<!-- social slider --><p><!-- social slider -->
<div class="reponsiveMobileHide socialsider socialsider_right_middle socialsider_fixed socialsider_bgcolor_white socialsider_opacity">
<ul>
<li><a data-socialsider="facebook" target="_blank" href="http://www.facebook.com/sharer/sharer.php?u=<?php echo WEB_ROOT; ?>" title="Facebook"></a></li>
<li><a data-socialsider="twitter" target="_blank" href="https://twitter.com/share?url=<?php echo WEB_ROOT; ?>" title="Twitter"></a></li>
<li><a data-socialsider="google" target="_blank" href="https://plus.google.com/share?url=<?php echo WEB_ROOT; ?>" title="Google"></a></li>
<li><a data-socialsider="linkedin" target="_blank" href="https://www.linkedin.com/cws/share?url=<?php echo WEB_ROOT; ?>" title="Linkedin"></a></li>
<li><a data-socialsider="reddit" target="_blank" href="http://www.reddit.com/submit?url=<?php echo WEB_ROOT; ?>&title=<?php echo SITE_CONFIG_SITE_NAME; ?>" title="Reddit"></a></li>
<li><a data-socialsider="pinterest" target="_blank" href="https://pinterest.com/pin/create/bookmarklet/?media=<?php echo SITE_THEME_PATH; ?>/frontend_assets/images/icons/favicon/apple-touch-icon-114x114.png&url=<?php echo WEB_ROOT; ?>" title="Pinterest"></a></li>
</ul>
</div>
<!-- end social slider --> </p><!-- end social slider -->Under the <head> tag add your "addthis" code. It says to insert on <body> but this will not work:
<!-- Go to www.addthis.com/dashboard to customize your tools --> <script type="text/javascript" src="//s7.addthis.com/js/300/addthis_widget.js#pubid=YOURPUBLISHERIDHERE" async></script>
Credit: coffee