Hi Bobby,
Thanks for contacting me here.
We have several options for customizing the look of the directory.
1) As of 4.0, we now offer Directory Skins (it’s like a WP theme, BUT it only affects your directory and you can keep your existing WP theme with it!). This is the quickest and easiest way to change the look of your directory. These are available for purchase here: http://businessdirectoryplugin.com/premium-themes/
2) Next is custom CSS to do basic tweaks like fonts, spacing and colors. Here is an article about how to use custom CSS with Business Directory in a way that doesn’t get overwritten on upgrade of BD: http://businessdirectoryplugin.com/support-forum/faq/how-to-use-custom-styles-with-bd-2-1/
3) For the more adventurous and layout-based changes, you can override templates: http://docs.businessdirectoryplugin.com/themes/customization.html#how-to-implement-a-template-override And also do more with fields: http://businessdirectoryplugin.com/support-forum/faq/advanced-customization-of-the-list-and-detail-views-of-bd/
4) But if that’s not enough, you can go full-bore and customize anything in the plugin if you have the proper skill set: http://docs.businessdirectoryplugin.com/themes/customization.html
Try that and let me know if you run into more issues.