pa-manual-title-prior-cat-list.php

add_filter( 'dlm_widget_downloads_list_start', function ( $return ) {
	global $wp;

	$term = get_term_by( 'slug', sanitize_title( $wp->query_vars['download-category'] ), 'dlm_download_category' );
	if ( ! is_wp_error( $term ) ) {
		$return = '<h2>' . $term->name . '</h2>' . $return;
	}

	return $return;
} );