I've got an European 3ds and so, my Nintendo Zone Viewer was hidden. I've discovered that if you correctly place the files in its corresponding folder and then iniciate the app from the FBI title menu, not only Satella Zone will work flawlessly but once you exit the app, it will appear in your 3ds menu.
Therefore, I suggest forgetting about hooking up your 3ds to an open wifi network and stick to this method:
1) Paste the files in the luma folder under its correspondent TitleID
2) Select Patch titles in the Luma Menu
3) Open FBI and navigate to Titles
4) Navegate for SatellaMenu!