I downloaded displayfusion awhile ago to use its dual monitor wallpaper function. Somewhere along the line it decided to add titlebar buttons. I then uninstalled it and the buttons remained. After reinstalling it to try to sort it out the thing is now adding a newer-looking titlebar button and the old ones are still there.

How do I get rid of these things? I can do this from the windows directory if someone tells me where to find it.

Image attached.