I have been using for some years QTTabbar.
I never enabled the tabs function.
I don't like it, I don't need it.
I'm happy with all the other function it provides.

Recently about a month or so ago, it starts to enable itself.
I go in Explorer I disable it again.
And somewhere, opening closing some folders it's back again.

A few minutes ago I just discovered that when I use Everything to search for something and double-click on a folder in Everything this suddenly enables QTTabbar tabs.
Never did that before.

I disabled the Tab function in Explorer respectively set everything back to default settings in QTTabbar only to find that it has enabled itself again!

Does anyone have a clue or know what the trigger is and why, as I never had this problem!