謝謝您提供的資料，但是...

To use the decrypter you will require a file pair containing both an encrypted file and its non-encrypted original version. It is important to use a file pair that is as large as possible, as it determines the maximum file size up to which the decrypter will be able to decrypt your files. Select both the encrypted and unencrypted file and drag and drop both of them onto the decrypter file in your download directory.

我的英文不是很好，但是看似好像要同時提供「已被加密檔案」和「未被加密原始檔案」才能解開

如果有「未被加密原始檔案」的話，那真的不用這個解密工具了，直接備份倒回就不型了嗎？