Thank you Dennis2 !
The solution below worked fine for me.

Sorry there is a bug with the latest version
Untick parental control then click OK
Then open settings again tick parental control and alerts you want to suppress.
Do not put in password at this stage click OK, then you will receive alert that you need a password.
Now apply password and click OK
This works on my partners computer and have tested on mine all suppress alerts stay ticked.
Dennis
I have uploaded a new video with solution to this Bug, You can
watch it here