[Plugin: Business Directory Plugin] Need to change default permalink

Thank you so much for great plugin

However, the default permalink for single listing is /%post_id%/%postname%/ and this permalink not match with my site permalink.

How I can change this to /%postname%/%post_id%/, which line of this plugin I need to edit?

Any help appreciated

http://ww.wp.xz.cn/extend/plugins/business-directory-plugin/