@diogobandeira: The steps below should help to roll back and change the social links:
– Go to Global Configuration >> select Editor – None in Default Editor option.
– Open your Social Link module and insert following code into:
<!-- AddThis Follow BEGIN -->
<div class="addthis_toolbox addthis_32x32_style addthis_default_style">
<a class="addthis_button_facebook_follow" addthis:userid="joomlart"></a>
<a class="addthis_button_twitter_follow" addthis:userid="joomlart"></a>
<a class="addthis_button_instagram_follow" addthis:userid="joomlart"></a>
<a class="addthis_button_youtube_follow" addthis:userid="joomlart"></a>
</div>
<script type="text/javascript" src="//s7.addthis.com/js/300/addthis_widget.js#pubid=xa-51fbcd3a05926764"></script>
<!-- AddThis Follow END -->
Replace with your social usernames. Hope that helps.