Hi Fabio, unfortunately at the moment the are no free decrypters available that could recover your encrypted files. Ideally you should restore your compromised data from a backup. If not available you could make a copy of your encrypted files and store them in some portable device. In the future authorities might catch the cyber criminals who are responsible for creating Locky ransomware and the keys used to encrypt victims data could be released. If this ever happened there's a chance to get back your files.