How to choose what icons are used for items

I see EasySocial uses an icon set using codes (e.g. "\e0ba") for each icon used. We want to override the current icon used for groups ("\e015") on our site to another icon from the EasySocial list ("\e0a7").

What would be the best way to override icon assignments like this? There are a few others we'd want to change. And hard coding it means when ES updates again, they''d be reverted anyways.

Thanks!