public function netunmount($netVolumes, $key) {
		$count = 0;
		$dropboxUid = '';
		if (isset($netVolumes[$key])) {
			$dropboxUid = $netVolumes[$key]['dropboxUid'];
		}
		foreach($netVolumes as $volume) {
			if (@$volume['host'] === 'dropbox' && @$volume['dropboxUid'] === $dropboxUid) {
				$count++;
			}
		}
		if ($count === 1) {
			$this->DB->exec('drop table '.$this->DB_TableName);
			foreach(glob(rtrim($this->options['tmbPath'], '\\/').DIRECTORY_SEPARATOR.$this->tmbPrefix.'*.png') as $tmb) {
				unlink($tmb);
			}
		}
		return true;
	}