> For the complete documentation index, see [llms.txt](https://manual-1-3.karamba3d.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://manual-1-3.karamba3d.com/chinese_1_3_3/troubleshooting/4.3.-miscellaneous-problems/4.1.2-purchases.md).

# 4.1.2: 购买程序

## 教育版（EDU）、专业版（PRO）和实验室版（LAB）的使用授权许可分别有哪些区别和限制？

相关信息，请参见[功能](https://www.karamba3d.com/buy/buy-online/)暨[许可协议](https://www.karamba3d.com/buy/license-agreement/)。

## 如果对专业版使用授权许可不满意，是否可以返还使用授权许可并申请退款？

Karamba3D始终致力于确保每位用户拥有愉悦的使用体验，并始终尽量协助用户排除故障、解决问题。但如果您的使用授权许可已被受理并发出，非常遗憾，您将无法获取退款。

如果您对该程序不满意，请通过[电子邮件](mailto:license@karamba3d.com)联系我们，我们会尽力协助您解决问题。

## 购买后多久可以获得使用授权许可？

Karamba3D使用授权许可将在付款成功后1-2个工作日内受理。如果在此期间您尚未收到任何[电子邮件](mailto:license@karamba3d.com)通知，请向我们发送购买的相关电子邮件予以核查。

## 我所居住的国家存在付款限制。我是否仍可以购买使用授权许可？

非常遗憾，付款受限的用户将无法购买教育版（EDU）/专业版（PRO）使用授权许可。

用户只需向我们发送[电子邮件](mailto:license@karamba3d.com)表明对软件的兴趣，我们将非常乐意协助您获取使用授权许可。


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