Screen Capture Highlight Won't Go Away

I know this issue is more than a year old, but when I use the selection tool to do a screen capture of a portion of my screen, the area I captured remains highlighted until I reboot the machine. The rest of the screen is darkened, which is really annoying. I see an old thread from last year on this, but it is still happening.

Is there a way to make this go away without a reboot?