1 pointThere's the possibility that law enforcement may be able to catch the criminals or otherwise gain access to their servers and release their database of private keys for use in decrypters. In case this happens I recommend keeping a backup of your encrypted files so that you have them in a safe place.
1 pointThis is a newer variant of STOP/Djvu, and if your ID is an online ID then there's currently no way to decrypt your files. There is more information at the following link: https://support.emsisoft.com/topic/32045-about-the-stopdjvu-decrypter/
0 pointsI recommend making a backup of your encrypted files in case decryption may be possible at some point in the future.