How can i add form field in business directory plugin?

I have download business directory wordpress plugin. I want to add form field in this directory plugin. I want to add dropdown field so how can i add this ??? I have use this http://ift.tt/1rBfUi5 plugin. My screenshot is http://ift.tt/1T3piYT

i wan to add dropdown field from backend file.

via Chebli Mohamed