Hey about the Win 7 drivers... when you plug the USB stick we will install some driver to an USB interface...
Then go to device manager and look for the Human interface devices -> if you only have one, so is the USB stick, double click (or proprierties) and unistall the driver, or update the driver! The windows try get the driver, cancel and point to the folder for the USB drivers for Zstar3. After this you will get the Zstar3 working on Win7.
This procedure working to , if when you open the Zstar3 GUI and you get lot of errors and the choice to Continue, Quit.
Close the Zstar3 GUI and make the procedure above. If you make everything right, then open Zstar3 GUI and no more errors
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Some suggestions, questions just say