Chaos Corona is a subscription license so once it reaches its expiration date, you need to renew the subscription to continue working with the products it includes.
All subscription licenses come with an auto-renewal option enabled which means that once the subscription reaches its expiration date it will get automatically renewed for another billing cycle. This option can be disabled/enabled at any time through My Chaos.
Once it expires and you want to use the product again, you will have to make a new purchase for a new subscription.