How to change listings slugs
All listings and taxonomies are registered in file listings_post_type.php in folder /wp-content/plugins/hangar/supported/
To change the "listing" post type word into the urls locate this snippet
Replace it with this
Change the word "your_slug_here" with what you wish to use.
To change the word "listings" into the listings categories taxonomy
Locate this snippet
'slug' => 'listings'
Replace the word listings with what you wish to use.
To change the word "location" for the listings locations taxonomy, locate this snippet
'slug' => 'location'
And change it to what you wish to use.
Once you have finished, save the file, and re-save your permalinks settings in your WordPress Dashboard