PRO version is life time. But the premium support and pro updates are time limited. One site license is available six month – 180 days. Since the date of purchase the pro license has passed 180 days. Therefore your license is expired. You can extend it for $19. It will be available 1 year after this.
In any case, all PRO features are still available after pro license has expired. As I said before – the expiration of pro license regards only to support and pro updates.