So long as you do not change the license it will remain lifetime, however if you upgrade it to the 4.0 license, you will lose it. If you can download the 4.0 update from someone else, you can use this legal license on 4.0. Are you following me. Because it is a lifetime license, in which it will work fully on 4.0, BUT you will not be able to down load the patch update from IPS to 4.0, because a lifetime license is not upgradeable to 4.0...Make sense?