Hi Brendan,
Glad to help you out here too!
The event description for the listing is generated with the_excerpt function. As the function documentation notes, you change change the excerpt length by adding this snippet to your functions.php file -located at wp-content/themes/your_theme/-:
function custom_excerpt_length( $length ) {
return 20;
}
add_filter( 'excerpt_length', 'custom_excerpt_length', 999 );
Another way to go is to create a template override for the the-events-calendar\src\views\list\single-event.php template as I just described in the other thread you opened: http://theeventscalendar.com/support/forums/topic/where-do-i-edit-the-html-which-displays-the-events-for-the-list-view/
Please let me know if this answers your question,
Best,
Nico