Save image Hamamatsu saves next image
When working in single-shot mode (triggered) with the Hamamatsu camera, the "Save Image" button does not save the current image, but the next one coming after the Trigger. The camera has an internal delay of 1.97 seconds and is working with the T2 trigger (2 s prior).
To save an image, one has to press "Save image" during shot mode, prior to the shot.