PixelHealer can be resized to work on a very small area around the dead pixel. The Settings window is very intuitive. It doesn't have to stay open for PixelHealer to work. PixelHealer does not clutter your taskbar. It has a small icon in the notification area.

Based On Experiments

PixelHealer uses the already tested concept that flashing RGB colors over a dead or stuck pixel will revive it. Learn more.