Change design?

Hi,

I am using “compact” design (I set it within the events calendar block).

I need to add something to the code (I need to have the featured image on the right side in desktop view, and in mobile view I need to have it below the title).

As it seems, changing /wp-content/plugins/the-events-calendar-shortcode-pro/templates/compact_tpl.php does not change a thing.

Which file do I have to change?

Thx in advance and best regards

Markus