Click Edit > Tangify All Circuits to smooth the connection between circuits that are below a specified angle.  

This angle is specified in the Tangify field. This provides a smoother cutting transition between arcs. The default setting is 6 degrees.

This displays a slight bump between two curves.

Select Tangify all Circuits. 

The transition between the two curves will be tangified to make the cutting smoother.

Because the above example may be difficult to see, I've created an exaggerated example of two arcs with an excessive bump between them to display the same principle.

Note that you would not normally use such a high number to tangify the project, because it will tangify all connections in your design below that angle; i.e., possibly turn rectangles into ovals.

Select Tangify all Circuits.

The transition between the two curves will be tangified to make the cutting smoother.

Optionally, use the Tangify button to tangify selected objects.

This allows you to manually select which objects to tangify.