In HS3, go to Plug-Ins>Manage and choose to install the plugin by selecting it.

After installation activate the plugin by enabling it in the plugins>Manage page.

Important: On a Windows Homeseer machine there will be a popup asking to allow the plugin access to the network. this is needed to enable UPNP scans for the plugin. Please allow the plugin for this. otherwise it will have a low chance to find bridges.

Once started see a line in the log that the plugin is not yet registered to any bridge. Also - if it finds any bridge on the local network, it will tell you how many bridges are seen in the network. This might take a minute, so please give it some time to discover bridges.

In the next step you need to register a first bridge to the plugin