With Text Control products, you can always update licenses not older than 5 major releases back. The current version is X9 (19.0) - so you can update the following major releases:
Update Your Licenses to a Subscription
You can also upgrade your current licenses to an annual Subscription, even if you currently don't own a Subscription. The Subscription program gives you access to all upcoming releases within 12 months and unlimited technical support.
Contact your sales representative and ask for your update options.
USA: +1 704 544 7445
Europe (Germany): +49 421 427067 10
Contact us by e-mail: Open a sales case