Launcher remaining open in the background

I have the option in the launcher set to close the application when the I close the application.

And yet, when I close the application it closes to the tray instead.

So I go to the tray and close it there.

But wait… Just to make sure, I open up the task manager, and sure enough, there it is, still running.

What is going on here? Why will your application not behave as expected? What kind of malware is this?

You have two weeks to fix this. My deadline is non-negotiable and I will accept no excuses.

This is a long existing problem. I have no other applications on my computer, some are even questionable, that operate in this manner. They all work as they are expected to, except for this one.

And I am done with accepting it. Fix it, now. Like right now. Not tomorrow, not after the meeting, not when you are done with what you are doing. Right now. Drop what you are doing and fix it. I demand it. I offer nothing in exchange. Just do it.

Edit:

I gave you two weeks. The behavior still exists. And you show no signs of even caring about it, let alone signs you are actually going to do something about it. So, game over, for both of us, it is time for us to part ways.