[Plugin: Jigoshop – WordPress eCommerce] modify recent_products shortcode html

i just apply the sortchode

[recent_products per_page="12" columns="4"]

and its working fine, but, how i can modify the template is using? for example, to add a buttom that says “more info” with the url, and also, try to get the post extract.

is there any way to find out where i can modify that template?
really cant find it anywhere

http://ww.wp.xz.cn/extend/plugins/jigoshop/