[Plugin: WP Highrise Contact] Using Shortcode outside of Post or Page

I need to use two contact forms. One in a page (which works) then one in the footer of my site.

<?php echo do_shortcode ( '[wp-highrise-contact]' ); ?>

I want to use the shortcode in my footer. I cannot seem to find where you register or how you register your shortcode for the post or page. I was hoping to try to copy it to add a “add_shortcode()” function.

Right now it just echos [wp-highrise-contact].

https://www.ads-software.com/extend/plugins/wp-highrise-contact/