Our company installed the Yisetong encryption software, destroy the file? The manufacturer has no way to fix it, what should we do?

Try ip-guard, it destroys files and can't be repaired, which means the product design is flawed, and generally there are file backup mechanisms that don't allow encrypted files to be corrupted, for example, ip-guard encrypts files by making a copy of the encrypted file first, and then overwrites the original file after it's finished, and the backup mechanism is very perfect, so you don't have to worry about encrypted files being corrupted.