Editing a reminder
Click on Tasks in the navigation bar at the top right of the screen
Select the task that has the reminder you want to edit and you can choose a new date and time from the Reminder drop down lists at the right of the screen
You can also edit the repetitions of a reminder, by clicking Edit at the top of the screen and choosing a new frequency from the Repetitions drop down list
Once you have set a repetition you can edit the start and end date of the repetitions by choosing an option from the From and To drop down lists
When you have finished, click Save at the top of the screen
Deleting a reminder
Deselect the Reminder box towards the bottom of the screen