fields/acf

Is there a free way to manage the fields? I was hoping maybe Advanced Custom Fields might work. But doesn’t seem to support WP Job Manager. Google search showed “nulled” versions of field editor. But I’m a decent person not trying to rip someone off. Just looking for an easier way to edit the fields without being overwritten on updates. Any help or suggestions or maybe a “props for not nullifying here’s a complimentary add-on” just curious.

https://www.ads-software.com/plugins/wp-job-manager/