FILTER

New Filter in FIG Version 1.2.6. You will able to change file name for better SEO by using filter.

Example

function fig_image_name_callback( $file_name, $post_id ) {
      $file_name = get_the_title($post_id);
      return $file_name;
}
add_filter( 'fig_image_name', 'fig_image_name_callback', 10, 2 );