The software definitely crashes when the cameras do not see the striped images from the projector...
That's interesting, I can't get to the striped images either, as I just get to the white square projected screen with "PC" and "CVBS" text in the top right, and the software hangs.
I have the right PLE file too, as I can calibrate
Here's hoping hugues replies, because he has a similar set up as mine.