Malwarebytes can not decrypt your files. It is an Antimalware-Software but not a Ransom-Decryptor. You can restore your Windows system. If you do not want to lose your files try the previous version feature. You can se how to do it on a german virus-entferner.de site: [external link removed] I will translate for you:
The Windows OS provides a built-in option of recovering previous versions of files. It can also be applied to folders. Just right-click on a file or folder, select Properties and hit the tab named Previous Versions. Within the versions area, you will see the list of backed up copies of the file / folder, with the respective time and date indication. Select the latest entry and click Copy if you wish to restore the object to a new location that you can specify. If you click the Restore button, the item will be restored to its original location.
After that, you can download a free scanner Paretologig PC Advisor and check your PC.