Hi eileens
When you purchase a membership like JA_Builder_Pro you will have access to the Premium Blocks,Page Library and Forum Support for one year - after the expiration you will be able to make any change needed at your blocks without limitations, what will be denied after expiration is the extension update, the access to library ( to download new blocks eventually added ) and forum support . if you want indeed to renew before expiration date, you can use the coupon renewal that allows you to receive a 20% discount on the extension price .
Hope it helps