Oof...thanks for letting me know, and yeah, I can confirm that Defender is freaking out on my end too.
From what I've learned, Windows Defender (and some other engines) loves flagging apps packaged using PyInstaller as a virus, trojan or whatever else. I'm not sure if a real, lasting solution was ever found (there've been new threads about this on the net for years) but I'll add a warning to the page for now and dig a little deeper soon. Hopefully I can find a workaround or something. Maybe the next Defender update will realize it's a false positive, but the one after that might flag it again ¯\_(ツ)_/¯
As for the tab thing, I didn't know about that. Gonna put it in once I've got the antirivus situation sorted out!