Stop Rehub from automatically cropping feautured image in posts

I am using the Worpress theme Rehub which automatically crops my featured images in posts. I do not wish for it to do that, and when inspecting the rendered image I see the below:

I have tried changing the source in the following files and setting to no avail:
functions.php
styles.css
Miscelaneous files in inc/
style-editor.css
Settings, Media (cropping is disabled)
Theme, Settings (cropping is disabled)

I have found the file containing code with

    #rh_wide_inimage figure

but that file does not contain code setting height to 550 px or cropping. I have found a custom resizer in the theme, but not sure how to disable it safely.