Spanning from failing drive.

My old hard drive if failing, but I'm attempting to recover all the tracks from it that I still can. It looks like it's just a few tracks that it gets hung up on, so I just remove them from my iTunes library every time I catch one from failed span. Problem is once I get a failed span, I can no longer restart the process as Tunespan is trying to complete the original span.

With only 10% of the drive left to span over, I think it would be best for me to do small batches. However, it looks like there might be no way to start a new span process. Is there any way for me to override the faulty span and start a fresh one?

Thanks