The plugin already uses “the_excerpt” – if you have text placed in the_excerpt box on WP this is all you need.
However, we have a function in the cr3ativ-recentposts.php that limits the excerpt as shown below:
function get_excerpt_by_id($post_id){
$the_post = get_post($post_id); //Gets post ID
$the_excerpt = $the_post->post_content; //Gets post_content to be used as a basis for the excerpt
$excerpt_length = 35; //Sets excerpt length by word count
$the_excerpt = strip_tags(strip_shortcodes($the_excerpt)); //Strips tags and images
$words = explode(' ', $the_excerpt, $excerpt_length + 1);
if(count($words) > $excerpt_length) :
array_pop($words);
array_push($words, '…');
$the_excerpt = implode(' ', $words);
endif;
$the_excerpt = '<p>' . $the_excerpt . '</p>';
return $the_excerpt;
}
So if you want to change it back to default, you would need to remove the above from the file mentioned, but everytime you update the plugin, it will get placed back in.