# 购买 Parallels Desktop

如果您正使用 Parallels Desktop 试用版本，可以直接从应用程序界面购买正式版本。要实现此目的：

1. 单击**关于 Parallels Desktop** 窗口中或促销中的**购买**。
2. 请选择下面一个选项：
   * **升级：选择该选项可以升级 Parallels Desktop 当前版本。但是请记住您将需要旧版本的激活密钥。如果默认选择了升级**选项，那么 Parallels Desktop 就已经自动检测到了旧版本的密钥。如果没有默认选定，请确定持有旧版本的密钥。
   * \*\*购买完整版本：\*\*选择此选项可以购买 Parallels Desktop（如果之前从未使用过的话）。
3. 请根据屏幕上的说明进行操作。您可能需要向下滚动查看所有信息。


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.parallels.cn/pdfm-20-ug-zh_cn/parallels-desktop-for-mac-20-yong-hu-zhi-nan/an-zhuang-huo-sheng-ji-parallels-desktop/gou-mai-parallels-desktop.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.