Pro Version licenses do NOT expire. Beginning with DoNotSpy10 Version 5, licenses will be only valid for one major DoNotSpy10 version. Each major version supports one major Windows 10 Update and all earlier Windows 10 versions (e.g. all versions up to Windows 10 October Update 1809). The next Windows 10 version will be supported by the following DoNotSpy10 version (e.g. version 6), which requires the purchase of another Pro license.
DoNotSpy10 Version 5 Pro