You can remove alarms that are no longer needed from the Settings window - Alarms tab.
To disable or enable an alarm, perform the following:
From the Main toolbar, select Tools>Settings. The Settings window appears.
From the Alarms tab, perform the following
To remove an alarm, click the row of the alarm you want to remove and then click the Remove button. The alarm disappears.
To quickly remove all alarms that disabled, click the Remove Disabled button. All disabled alarms disappears.
Click OK, to save the new settings and close the window