Second instance - Both instances show all plugins
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**Describe Your Problem:**
If installing a second instance of HB the plugins section shows all plugins installed in both instances 

**Logs:**

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**Screenshots:**
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**Environment:**

* **Homebridge Raspberry Pi Image Version**:
* **Node.js Version**: v14.16.1
* **NPM Version**: v6.14.12
* **Homebridge Version**: v1.3.4
* **Homebridge Config UI X Plugin Version**: v4.41.1

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