If you don't see the Orca3D toolbars after you install Version 3, please follow these steps.
1. Open the Document Properties (File/Properties), and select Toolbars
Rhino 8
Rhino 7
The highlighted area is labeled differently in Rhino 7, but the process is the same.
2. Select Orca3D from the list, and then select the toolbars or groups that you want to show on your screen. Note that a Toolbar Group is a tabbed set of Toolbars, so if a Toolbar is in a Group you do not need to select both. For example, the Advanced Stability Group includes four toolbars: Compartments, Create Design, Stability Analysis, and View.
3. Click OK. Then you can dock the toolbars if desired, or leave them floating.