If you need a time-limited full version (a version which expires after the product was bought like a subscription), check: Time limited version after Activation.

 

The time limitation is done either by number of days or using an expiry date.

 

When you create a Serial Number you can define, how many days after applying the Serial Number the license should be valid  (field: Number of days until the full version expires) or you can specify an expiry date. This allows you to work with different expiry dates, e.g. sell a version which runs for 1 year or 2 years.

 

When the version expires, the user needs a new Serial Number, to continue working with the product.

 

This time limitation is independent of the time limitation of the evaluation version.