Hi,
An appointment became confirmed after paid at PayPal if that option is enabled or after requesting it if no payment is required.
A confirmed appointment will appear over the calendar in the administration area, to see an appointment click the appointment date and then click the appointment time-slot.
Note: The time-slots with appointments will appear strike-through.
After clicking the appointment time-slot a floating panel will appear letting you edit the event. There is a “Clear” button on that panel, click the “Clear” button (the appointment title will be cleared) and then click “Save”. This action will delete the appointment and the time-slot will became available again.
Thank you for using the plugin! Let us know if you need further assistance.