[Plugin: Page.ly MultiEdit] How do I use this?

I’ve just taken over someone else’s project, and the site owner’s asked me to make a change. I eventually found the content in the theme editor under as this: <?php multieditDisplay(‘ApplyBox’);?>

I need to edit the content in the ApplyBox, but can’t even find it. can someone please point me in the right direction? cheers.

http://ww.wp.xz.cn/extend/plugins/pagely-multiedit/