No use of Nintendo Zone app if MAC is not changing anyway! Try to temporarily disable your firewall and antivirus software, so nzone.macs could be downloaded. Windows Defender and Windows Firewall won't inerfere, at least with the default settings.No idea if it would even work. Ran your new nzone.exe last night (which didn't even grab the nzone.macs file and didn't change the mac at all either), so no Streetpass hits.
And, well, if I could check it with the Nintendo Zone app I would, if I still had it, lol.