The newer version of the HP 3D Scan Software (5.5) has a bug with the David Laser SLS-3. It freezes the screen after the first scan. You have to shutdown the camera and turn it back on to do another scan, it's unproductive. so I had to re-install the latest version (5.3) to keep working with the software.
I realize the same issue also with latest HP 3d Scan v5.5.1.
I am also using the HP S3 camera. The issue happens quite often and is making reliable and productive scanning with HP automatic turntable almost impossible. Please urgently fix this issue.
Beside this i have also realized that in dual mode it happens sporadically that calibration from one camera is getting lost resulting in unusable scans.
I understand that you're having some problems with the cameras on the latest version of HP 3D Scan pro. From what I can gather the latest versions 5.5.0, and 5.5.1 are having problems grabbing frames from the cameras.
Sometimes on certain systems the computer's USB ports are not capable of providing enough power to the cameras, and as a result the camera may experience frame drops and/or camera dropouts. In these cases the software may stop mid-scan and require the user to press the cancel button and toggle the camera off then on. Typically situations like this can be solved by plugging the camera into an externally powered USB hub.
That would not necessarily explain why an older version of the software works, however. In order to help the Software team look into the problem it would be helpful to know if you are successful at scanning using version 5.3.0 and version 5.4.0 of the software.