I had this template as a back up template for one of my main sites. I didnt have any issues with using the Fresh style. My fresh.css file is blank as well. Here’s a snippet from my index.php:
# BEGIN: TEMPLATE CONFIGURATIONS ##########
####################################
#support extra color themes
$ja_color_themes = array('fresh','warm'); // You can add more color array if needed
####################################
# Change the width of the template
$ja_width_default = 'narrow'; // 'narrow': 800x600; 'wide': 1024x768
# default color
$ja_color_default = 'fresh'; //blank for default, else pick one of in extra color themes $ja_color_themes
#font size default
$ja_font_size_default = 3;
The template says to use blank for default, you can try entering ‘fresh’ there. Let me know if that helps.