You don't have to. I talked about "testing".
You use SaveMii to:
- backup your current save
- "restore" a downloaded 100 % save from the internet
- check whether it's working in Aroma (spoiler alert: it won't)
- restore your own save
- report back here
However, I'd be surprised if MikaDubbz wouldn't be aware of this and since he still claims it won't work in Aroma, that's highly likely the case.