What happened
Analysis and impact
这一政策调整意味着，持有旧版永久许可证的用户若想继续获得更新和技术支持，将需要接受订阅付费。报道指出，此举反映了软件行业更广泛的趋势：越来越多的工具类软件从一次性买断制转向持续付费的订阅制，以获取更稳定的收入流。对于 TreeSize 而言，这一变化直接影响到依赖其永久许可证的长期用户群体。
从用户角度看，永久许可证的核心吸引力在于一次付费、长期使用，而支持服务的终止并不会让软件本身立即失效，但会使用户在遇到兼容性问题或安全漏洞时缺乏官方维护。Ars Technica 的报道并未详细列出受影响的具体版本范围或订阅价格，但明确指出“当前的经济条件”是开发商调整商业模式的直接理由。
在更广泛的软件行业背景下，订阅制转型已成为常见策略。虽然本次报道未提供 TreeSize 的具体用户数据或财务信息，但类似调整通常被解读为开发商在寻求更可预测的现金流。对于用户而言，是否接受订阅取决于其对持续更新的需求程度；对于仍能正常使用的旧版本，用户也可以选择继续使用而不订阅，但将失去官方支持。
References
Original source text
The company behind the disk space analyzer TreeSize has irked some users by no longer offering support or updates for perpetual licenses beyond their maintenance period unless customers subscribe. Further frustration has come from JAM Software's long-standing policy of not providing license keys or installers to TreeSize perpetual license holders after that support period ends.
Since 2025, JAM Software has been transitioning most TreeSize editions to subscription models. Today, it sells perpetual licenses only for personal use, which include 12 months of updates, support, and “downloads of older versions, and your license,” plus the option to extend the support period. TreeSize currently has "no plans to discontinue the sale of perpetual licenses for TreeSize Personal," product manager Hendrik Christ told Ars Technica.
As perpetual-license maintenance periods expire, customers are discovering that extending support now generally requires subscribing to software they already own the right to use.