If you are referring to the rss feed URL in the header, you will need a code change to do the same. In the {theme folder}/framework/functions/utility-functions.php, pls locate following code
if (!$display_socials)
return;
$facebook_url = mo_get_theme_option('mo_facebook_url', '');
$twitter_url = mo_get_theme_option('mo_twitter_url', '');
$linkedin_url = mo_get_theme_option('mo_linkedin_url', '');
$flickr_url = mo_get_theme_option('mo_flickr_url', '');
$rss_feed_url = get_bloginfo('rss2_url');
and replace the above code in bold with
$rss_feed_url = 'http://feeds.feedburner.com/yourfeed';
. Also you may want to read the following http://codex.wordpress.org/Using_FeedBurner.