BSF_Rollback_Version::upgrade()

	protected function upgrade() {
		require_once ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';
		$upgrader_args = array(
			'url'    => 'update.php?action=upgrade-plugin&plugin=' . rawurlencode( $this->plugin_name ),
			'plugin' => $this->plugin_name,
			'nonce'  => 'upgrade-plugin_' . $this->plugin_name,
			'title'  => apply_filters( 'bsf_rollback_' . $this->product_id . '_title', '<h1>Rollback ' . bsf_get_white_lable_product_name( $this->product_id, $this->product_title ) . ' to version ' . $this->version . ' </h1>' ),
		);

		$upgrader = new Plugin_Upgrader( new Plugin_Upgrader_Skin( $upgrader_args ) );
		$upgrader->upgrade( $this->plugin_name );
	}