Emsisoft Decrypter for Radamant can decrypt your files that have been encrypted and renamed to either *.rdm or *.rrk.
Radamant encrypts your data using AES-256 encryption and requires you to pay, via BitCoin, approximately $230.00.
Radamant will add registry extensions and rename files as well as add a copy of C:Windowsdirectx.exe. It then scans for, and locks, hundreds of possible file extensions.
To use Emsisoft Decrypter for Radamant simply browse to the folder that has the locked files and click on "Decrypt." A results tab is available to see what was discovered. Two additional options are available - keep encrypted files, and use a custom decryption key instead of the automatically determined one. Keep encrypted files is on by default, so the second option is for advanced scenarios.