DCryDecrypter can decrypt files encrypted by the DCry Ransomware.
DCryDecrypter is portable and should be Run as administrator. The app looks like Michael Gillespie's other programs, so if you've used them, it's a simple, familiar interface.
If your files are encrypted with the .dcry extension, then this is most likely the decrypter you need.
The interface is as straightforward as they come. Select the directory that the ransomware has affected and click "Decrypt." When completed, you will be shown a status Window with the directory scanned, what was found, and how many files were decrypted.
DCryDecrypter also has the ability to load a base-64 encoded key and includes a utility called BruteForcer for advanced users when you stumble upon more complicated Dcry ransomware.