[whpalmer4]

All is not lost! There's a trick you can use with the iOS apps to achieve the same thing.

Go to the project that contains the repeating action. Change the view settings (with the eyeball icon) to show all actions. Now check the repeating action as complete, then immediately uncheck it. Marking it complete will create the next one, to be done as scheduled, and marking it incomplete will bring it back so you can complete it again. Edit it to set your new start date, and remove the repeat.