I hasten to please many users of Windows 7 - today Duplex Secure has released a version of the SPTD driver compatible with this OS. You can download it at www.duplexsecure.com/downloads . Communicating with developers about bugs is assumed in the thread on the forum.
DAEMON Tools with integrated SPTD 1.58 exists so far only in the paid Pro version. But no one bothers to put DAEMON Tools, and then DAEMON Tools Lite.