Yii2: How to download backup files using spanjeta/yii2-backup?

public function actionDownload($filename = null) {

    $file = $filename;

    $this->updateMenuItems();
    if (isset($file)) {
        $sqlFile = $this->path . basename($file);
        if (file_exists($sqlFile)) {
            Yii::$app->response->sendFile($sqlFile);
        }
        //throw new HttpException(404, Yii::t('app', 'File not found'));
    }
}

public function actionDownload($file = null)
{
    ini_set('max_execution_time', 0);
    //ini_set('memory_limit', '512M');

    $message = 'OK';
    $this->layout = null;
    $this->updateMenuItems();

    $list = $this->getFileList();

    $list = array_merge($list, $this->getFileList('*.zip'));

    foreach ($list as $id => $filename) {

        $columns = array();
        $columns['id'] = $id;
        $columns['name'] = basename($filename);
        $columns['size'] = filesize($this->path . $filename);

        $columns['create_time'] = date('Y-m-d H:i:s', filectime($this->path . $filename));
        $columns['modified_time'] = date('Y-m-d H:i:s', filemtime($this->path . $filename));

        if (date('M-d-Y' . ' \a\t ' . ' g:i A', filemtime($this->path . $filename)) > date('M-d-Y' . ' \a\t ' . ' g:i A', filectime($this->path . $filename))) {
            $columns['modified_time'] = date('M-d-Y' . ' \a\t ' . ' g:i A', filemtime($this->path . $filename));
        }

        $dataArray[] = $columns;
    }

    $dataProvider = new ArrayDataProvider([
        'allModels' => array_reverse($dataArray),
        'sort' => [
            'attributes' => [
                'modified_time' => SORT_ASC
            ]
        ]
    ]);

    if (isset($file)) {
        // $sql = new MysqlBackup();
        $sqlFile = $this->path . basename($file);
        if (file_exists($sqlFile)) {
            Yii::$app->response->sendFile($sqlFile);
        }
    }

    return $this->render('restore', array(
        'error' => $message,
        'dataProvider' => $dataProvider
    ));
}