Hello Romeo,
I believe you are confusing the Software License Agreement with the Software Tools License.
The Software License Agreement covers how the software you develop using the NXP provided SDKs may be used and distributed. The terms and conditions you agreed to when you installed the SDK specify the limitations. I'm not aware there is a defined time limit, but you should review this agreement to ensure you understand the limitations and that you are in compliance.
The Software Tool License for S32 Design Studio is what enables you to activate and make use of the IDE for development purposes. You cannot use the IDE without an active license. This license is generally provided with expiration of 3 years, however, we can extend the tool license for you at any time.
I hope this answers your question.
Best Regards,
Mike