I backed up some files to a Zip file from my Mac G4 notebook. I had no choice than to back them up to a PC, and upon trying to unzip, I found that nothing could open a corrupt 10.2 GB archive. Out of skeptisim, I downloaded DZIPR, and found that it could repair my file, so I went ahead and ordered to remove the limitation of the trial version. I ran again, and while it repaired, not only did it recover some data, it recovered it ALL! I am so pleased that Tech Support answered my emails so quickly, and they were extremely helpful (changing my overall opinion of software tech support) Thanks for making such a usefull utility. Are there plans for an OS X version anytime soon?