Thanks @firstdefence. I'm on a Mac. It turned out I didn't need the old ones after all - the job's requirements changed so I just started again.
This time I sent my efforts to Shifu but he said he wants the Enso symbol and the path to all be made from the exact same brushstroke (Previously, I created a different vector shape for the path and then just used freehand brush strokes to fake it - see first screenshot)
So my plan is to create a vector shape, apply that watercolor brush stroke to it, but have it get narrower once the path begins (second screenshot). So questions is:
Is it possible to vary brush stroke width within the same vector shape?