Sorry, no. That, of course, is the whole idea of Eraser. Cold comfort for you, I know, but all this is explained in the FAQ.
You could try a file recovery program, to see what it discovers. The complexity of the file system is such that, under some circumstances (such as after a defrag), copies of data the file system is not currently tracking can lurk on the drive, and some programs can recover these. But it's a very long shot, hence my answer.