So this happened to me a couple times already, enough that I think a small feature request was warranted ^^
I have two monitors, right one is usually with Chrome, left one with startools... often when trying to click my left most tab on my right screen I go a tad too far and click on the top right part of my left screen, just where the Close button for windows is. I usually browse online, while waiting for Startools to do it's stuff.
It would be awesome if you have an image open that clicking the button would prompt you whether you really want to close or not, I was near the end of my processing and have to redo it all now.
Entirely my fault! But I would love that option to be in!