Trace Lines using centerline option

My old version of Corel Trace allowed me to trace line drawings using a "trace centerline" setting but I cannot find how to do this in the new software. Now when I trace I get searate lines for each side of my drawn line and in between is filled with a colour. Does the centerline option exist in this version and, if so, where is it? If it does not exist, can someone suggest a simple solution please.

My drawings are in black ink on white background so colour is not an issue.