Is the license of Revo Uninstaller Pro a lifetime license?
Purchase of a License includes free lifetime technical support and free updates of the program, till the next major version, i.e. 3.1.1; 3.5.0, 3.9.9 free updates till version 4.0. Major version (like 4.0) will include major improvements and major new features. Depending on its features you can decide to upgrade by purchasing an upgrade license (significant discounts will be applied) or to continue using the purchased version. You can continue using the major version for which you have purchased a license for as long as you want.