I bought an Apple TV (2nd Generation) which has been jailbroken (4.4.4). I want to completely erase and restore to factory settings. Is the best way to do this from the ATV menu or by connecting to iTunes? I don't really need or want to jailbreak the device at the moment but if I want to jailbreak in the future what's the best thing to do now (e.g. save SHSH blobs for 4.4.4 / just wait for untethered 5.0 jailbreak)?