Unfortunately, you are unable to change the status from expired to open as the event date has already passed, but an expired status does not mean that it is closed. The registry is still fully functional and available to the public and the retailer.
Registries can be in 3 different status states:
Open: Before the event date. Available to the public and the retailer.
Expired: After the event date has passed. Available to the public and the retailer.
Closed: Based on the time limit set by the retailer. Only available to the retailer.
Open and expired registries are considered 'active'. Your pricing plan will be based on these registries only.