Are SmartPLS licenses subscription based?

The SmartPLS licenses are not a subscription and you are not forced into an ongoing contract.

You need to purchase a SmartPLS license key for a certain usage period (e.g., 1 year). After each purchase we send you a license key that you can use to ++activate++ the SmartPLS software. The usage period starts at the day when you use your license key for the first time to activate the SmartPLS software on your computer device. The license key will be valid for the purchased period. After that period, you may purchase a new license. But you need to actively do this; there are no automatisms in delivery and billing of follow-up licenses.