How to edit Shareaholic CSS

I have installed the Shareaholic plugin. I like the plugin however, I cannot find their CSS to edit. When I look with firebug, their CSS stylesheet is obviously being used over mine but when I go to search for it, I can’t find it.

I’ve been looking at Shareaholic’s website and forums and from reading those it looks like I can edit css and edit the icon images by going into advanced settings and overriding mods. But I don’t see that anywhere.

I’m using Version 7.0.3.6

My site is http://www.totemag.com