[Plugin: Zopim Live Chat] broken

This doesn’t even make it past setup, clicking on any of the menu items under Zopim Live Chat gives me this error:

Fatal error: Call to undefined function curl_init() in C:\wamp\www\babymilks\wp-content\plugins\zopim-live-chat\zopim.php on line 243

http://ww.wp.xz.cn/extend/plugins/zopim-live-chat/