File Tab

New

Creates a new (empty) material library.

Open

Opens a different material library.

Import

Imports a material library into the current library.

Export

Exports the current library.

Preferences

User Interface

You can change how the Material Library window looks like.

Material Library Server

Shows the current Material Library Server you are connected to. If you want to discover a new server press Discover. If you want to disconnect from the server, press Disconnect.