If some antivirus program says that file is malicious, then it's a false-positive. While MEMZ-Clean can have the same behavior as the destructive version, it can't fully destroy or crash the operating system and is totally controllable inside a GUI. I still can't give warranties, so you should still use a VM or a non-productive machine.
EDIT: Fixed DL Link. Dropbox sucks. I never use that shit again.
EDIT 2: Google Drive link dead as well, because "viruses", fixed link again.
EDIT 3: The idiots from Freenom cancelled my domain without notifying me or telling me why. Now it's on Drive again, but password protected, so I hope their antivirus bots won't take it down again.