Sorry you had issues but like @cloggy49 said, there is no reason to restore anything. The files you saw weren't real. It's one of the many protection mechanisms that RansomOff uses to confuse and identify ransomware. For some reason, RansomOff had an issue validating your Explorer instance which is why you happened to see the phantom files. The most likely reason is because of other security software on your machine which is why RO asks for you to exempt these programs during install. But once RO is turned off, the "files" go away so if you have issues that's all you need to do. Again, doing a system restore is not necessary.