To switch between events, tap on the "Menu" button seen on the top left. There you'll see the EventBooth Menu, which allows you to access Settings, Lock the Screen, or Change Events.
Tap on the Events button, where you'll see the "Event Selection" screen appear.
Select the event you'd like to switch to by tapping on it. If you don't see your event appear, try tapping on the "Refresh List" button.
Tap "Continue" to switch to this event.
Now you're ready to take photos of your event!