你忘记先删除之前的spine-unity运行时版本，删除Spine和Spine Examples目录。 然后安装spine-unity 4.0。
此处提供了 Spine-unity 3.8 到 4.0 升级指南
Spine-Unity 3.8 to 4.0 Upgrade Guide
不幸的是，它目前仅提供英文版本。 我将很快创建此升级指南的中文（机器翻译）版本。
You forgot to delete the previous spine-unity runtime version first, deleting the Spine and Spine Examples directories. Then install spine-unity 4.0.
There is a spine-unity 3.8 to 4.0 upgrade guide available here
Spine-Unity 3.8 to 4.0 Upgrade Guide
Unfortunately it's currently provided in English only. I will create a Chinese (machine translated) version of this upgrade guide shortly.
现在有中文（机器翻译）版的spine-unity 3.8 to 4.0升级指南可以在这里找到：
Spine-Unity 3.8到4.0升级指南
There is now a Chinese (machine translated) version of the spine-unity 3.8 to 4.0 Upgrade Guide available here:
Spine-Unity 3.8到4.0升级指南
