I was hoping that some obvious issues would be addressed in the recent update, but I was wrong.
There is a nice button above the event time & date settings to flip between a "normal" event and a recurring event. Awesome!
BUT, if you publish the event, and then wish to edit it, there is no easy option (in fact I can;t see any way) to turn it back into a one off event. No button to change it back, no way to easily convert it from recurring to "normal".
Please address this issue.