1) Please install and activate child theme, otherwise you will lose the changes when you upgrade the theme.
See the instruction below:
a. Get the “conference-pro-child” folder available in the “misc” directory inside the theme package;
b. Copy “conference-pro-child” folder inside “/wp-content/themes” folder of the WordPress installation;
Open style.css file from the child theme and make sure ‘Template’ is ‘conferencepro’ and update the page.
c. In your WordPress admin area, go to “Appearance->Themes”;
d. Activate the conference pro child child theme.
2) Copy /wp-content/themes/conferencepro/components/templates/shortcodes/efcb_schedule.php to child theme /wp-content/themes/conferencepro-child/components/templates/shortcodes
3) Please create the template structure in child theme.
4) Open /wp-content/themes/conferencepro-child/components/templates/shortcodes/efcb_schedule.php
5) Around line number 70, you can find:
<option value=”0″><?php _e(‘Track’, ‘cpt’); ?></option>
6) Change this to:
<option value=”0″><?php _e(‘Sort’, ‘cpt’); ?></option>
7) Save the file.
Please try and let us know if any issues on this.