This is possible with Version 2.2 and beyond.  You now have the ability to edit not only the css but also the copy and language of the different areas of the plugin.

You can edit the css (styling and look) by going to the css folder of your Contest Burner plugin folder:
/wp-content/plugins/contestburner/ContestBurner/css

You can edit the copy and language by editing the default.php file in the language folder:
/wp-content/plugins/contestburner/ContestBurner/languages