I want to add to our website, which is https secure. As far as I can tell, I can't find a way to do this.
To use AddThis on HTTPS sites you need to call our JavaScript from https. The easiest way to do this is to simply omit the protocol, like this:
<script src="//s7.addthis.com/js/250/addthis_widget.js" type="text/javascript"></script>
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