Creating and editing curve in 3D

Dear Shapr,
It is possible for you to upgrade your program to allow me to create a curve in 3D. I know i can draw a curved line and edit the individual points on the curve, but i can only move each point along the same plane that I am in. I want to be able to create curved shaped jewelry pendants like this (see attached photo). Right now im using the loft tool to connect lots of separate rectangles but it is SOOO tedious and it just doesn’t look smooth.