Unity Plugin Install Error

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I've been struggling getting Houdini setup and running with the plugin, but it keeps giving me the same error:

```
Plugin was built with:
Houdini: 22.0.466
Houdini Engine: 9.0.0

Unable to detect Houdini Engine installation.
License Type Acquired: Unknown


System PATH:
C:\Program Files\Side Effects Software\Houdini22.0.466/bin
C:\Program Files (x86)\Common Files\Oracle\Java\java8path
C:\Program Files (x86)\Common Files\Oracle\Java\javapath
C:\VulkanSDK\1.4.350.0\Bin
C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v12.4\bin
C:\Program Files\NVIDIA GPU Comp...

(For the full message, see the editor log file)

```

I can run the Houdini application. It says Houdini Apprentice Non-Commercial 22.0.466 - Py3.13.
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