functions.php

<?php
add_action( 'current_screen', 'wpdocs_this_screen' );

function wpdocs_this_screen() {
	$current_screen = get_current_screen();
	if ( strpos( $current_screen->id, 'forminator' ) !== false ) {
		$scripts = array( 
			'wpdm-gb-util',
			'wpdm-link-templates',
			'wpdm-package-selector',
			'wpdm-category-selector',
			'wpdm-category-dropdown',
			'wpdm-icons',
			'wpdmgb-sidebar',
		);

		foreach ( $scripts as $script ) {
			wp_deregister_script( $script );
		}
	}
}