5.3 - 5.8
Create a Plugins directory inside your UE project root directory.
Unpack the downloaded archive to the Plugins directory.
Run the project and make sure the ZibraGDS plugin is enabled.

Get license key on https://www.zibra.ai/zibragds
Go to Tools > ZibraGDS > Open License Settings
Input your key in the “License Key” field.

You should see the “ZibraGDS Licensing: License successfully verified” message in the notification.