On the top of the page of almost every word processing or other file building program is a little twisted arrow that signifies the ability to click open that button and undo your last moves. Wouldn’t it be great if there were a way to undo all of our computing errors? The first thing you would want is a button to undo file deletions and program installations that have gone awry. To be honest programs to undo deleted files have been around for a decade. But unfortunately most of them were dedicated only to Windows applications. And, those that were designed to be used on Apple Macs were pretty much ineffective.