How to prevent the Curvature tool (AI CC) from editing existing paths?

Is there a way to prevent the Illustrator CC Curvature tool from editing existing paths when drawing nearby?

When I use the curvature tool near an unselected existing path, the existing path becomes selected. Then, the curvature tool changes to an "add anchor point" curvature tool and tries to add additional points to the existing path.

Short of locking down existing paths, how can I use the curvature without editing existing paths?