Open the program and open the scan area is there any message there? I would assume you have not clicked on done after the scan. I tested this and got the same when I did not close the scan properly after a scan.
I closed McAfee down since I wanted to work and almost forgot about it. I've restarted twice since then and I did open up the app remember to go into the scan option and sure enough the "Done" button was there. i clicked on that and it has indeed gone.
good to see it is sorted