Unfortunately I have been unable to locate anything approaching a cure for this, it may well be a month or so before one of the labs cracks it and then they will probably need to be very lucky.

This is the only option offered at the moment

10.Unfortunately, at this time there is no decryptor for the files that have been encrypted by this malware. This means that you will need to restore from a backup or attempt to restore from a previous version using Windows. To restore from a previous version when there is no backup available, please rename the file to its original filename. Then right-click on it and select Properties. When the Properties window opens, click on the Previous Versions tab. You will now be shown a screen screen that lists any previous versions you may have of this file. If you find any, backup the existing encrypted file and then restore the previous version. Windows will then restore the older file and overwrite the encrypted one.