Center Flipbox & Button Not Working

Just wondering if there is a way to center the flipbox in a column. Right now I have the flipboxes on the homepage of my site using the “widgetized sidebar” visual composer element. Is there a way to center the flipboxes? Link to site: https://490.572.myftpupload.com/

Also the buttons on the back side of the flipbozes are not working even though I have placed links in them.