I have tried this program for 3 months and am a regitered user. It doesn't work if it's 1. minimized in the dock, 2. not the frontmost window (i.e. if the finder is in the foreground and this window is in the background - it fails), and 3. if it's been operating longer than 36 hours, it fails. No documentation, and the deeloper does not respond to issues.