Norton kept calling it Trojan.

I felt my MBP was slowing down and searched for free tune up program. I came across this one and tried to download the app from the app store; however, the Norton anti-virus I have kept flagging it as ‘Trojan’. It deleted it 3 times in a row. I preferred to be on Norton’s side and declined to use this program. Case in point: this free program MIGHT be some malicious kind of program.
FYI- I’m as naive as it can get when it comes to programs.

Tigreway about Tweak and Tuneup