Well, let me put it this way.....
I go to the Apple menu and select "App Store"
When the window opens up I click on "Welcome Marc" and enter my password to login
Then I click on the "Updates" tab and it lists all of the updates I have waiting (6 of them)
Within that list I move my cursor over "Red Crucible", a game I tried and decided I don't care for, therefore I'm not interested in updates for it
I tried left-clicking on the icon, I tried control-clicking on the icon, I tried option-clicking on the icon (and yes, I stand corrected on the option-click versus control-click) with no response ....
So I tried left-clicking on the text to the right of the icon (and several places within the text), I tried control-clicking on the text to the right of the icon (and several places within the text), I tried option-clicking on the text to the right of the icon (and several places within the text) with no response.
I have tried everything that has been recommended here .... with no response.