Why are some of my Event Files grey and some are green?

The difference between Booked and Closed Events is that Booked Events have a remaining balance on their payment schedule; as well, VenueBook will not close the Event until the Event date is in the past. Closed Events have already taken place and do not have any outstanding balances in the Payment Schedule. This allows VenueBook to automatically close the event and move it into an "inactive" state.