How can I desactivate some fields

Thanks for your post,

you can use filter hook like this

for example i have removed meta field “job_bm_company_name”

add_filter('job_bm_filters_job_meta_options',  'job_bm_filters_job_meta_options_extra' );	

function job_bm_filters_job_meta_options_extra($options){

			// unset/remove any meta fileds

			unset($options['<i class="fa fa-university"></i> Company Info']['job_bm_company_name']);

			return $options;

		}

you need to find which tabs meta fields you want to removed and find the index for $options (see i use “<i class=”fa fa-university”></i> Company Info”) under method job_meta_options() following file
job-board-manager/includes/class-functions.php

Thanks