changes footer

Hello Anyone know it change the copyright in the theme footer full frame (not premium) ? I try to change in fullframe-default-options.php these lines $fullframe_content['left'] = sprintf( _x( 'Copyright © %1$s %2$s. All Rights Reserved.', '1: Year, 2: Site Title with home URL', 'full-frame' ), date( 'Y' ), ''. esc_attr( get_bloginfo( 'name', 'display' ) ) . '' ); $fullframe_content['right'] = esc_attr( $theme_data->get( 'Name') ) . ' ' . __( 'by', 'full-frame' ). ' get( 'AuthorURI' ) ) .'">'. esc_attr( $theme_data->get( 'Author' ) ) .''; Unforgettable, no change on the footer ! Thanks netmairie