CoursePress shortcode editing


I have already edited some shortcode content/actions in CoursePress via editing the following file: wp-content > plugins > coursepress > includes > classes > class.shortcodes.php

What I would like some help with is: How do I edit these same shortcodes in a way that they will not be reset whenever there is an update for CoursePress? I have already made a backup copy of class.shortcodes.php to upload should I not have any other choice, but I'd like to be able to not worry about doing this.

Thank you.