I was hesitant to use any app that could delete files without me having total control. I see from a review that the new Disk Doctor Pro has the same problem.
It will no longer let me accept user files to analyse, so is unusable. With the release of Disc Doctor Pro I thought I would use my original version again to decide whether to upgarde to Pro. This used to work well, but I found an alternative that I preferred so stopped using it. Original Review- So Far So Good - Update - no longer works
