From the Dashboard, click Configure to open the JRNI Configuration menu.
Click Regular Events.
Click Past Regular Events.
Click Edit next to the desired Event.
Click Copy to create and open a new copy of the Past Event. (You may still edit the details of the Event as you desire.)
Click Re-Run to reopen the Event and enable it.
If there are existing Bookings on the Past Event, you may click Cancel to remove and cancel all related Bookings.