"Mute alarms or don't" is a false choice. The right way to do this is straightforward. When the user presses mute, if an alarm is scheduled and DontShowAgain

"Mute alarms or don't" is a false choice. The right way to do this is straightforward. When the user presses mute, if an alarm is scheduled and DontShowAgain is false, then pop up a window and ask the user how he wants the alarm to be treated. If the user also checks DontShowAgain, set it to true and never show the window again.