I can't get it to crash either. The thing I have noticed is that the Color/Grayscale mode in the output stage "forgets" about all the content selection and page layout from the previous steps and outputs an image to disk without any of those steps being done. Am I correct to assume that the Color/Grayscale choice doesn't do any image processing to the image (such as despeckling, etc) if the equalize illumination option isn't chosen? In other words, do I get an non-degraded image as output if I choose no despeckling? If so, would it make sense not to change the DPI of the results by default? If not, what processing is being done in the output stage.
The second thing I have noticed is the scrollbar in the preview/thumbnail pane doesn't allow scrolling to all images because the previews seemingly want to keep running up off the top of the page, makes work more difficult than it used to be. I find I repeatedly have to hit page up to get back to the page I want to work on as I go through the stages. It would help if each stage reset back to the first image instead of starting on the last. I see that some of the changes were intended, but with no scrollbar *or* way to scroll with the mouse it makes it harder.
I also see that the changes to the Page Split stage were intended, and the new code is much more accurate in picking the correct side, but I found the green arrows useful to switch if needed.
Also the mixed mode allows adding image zones, but it doesn't allow unmarking zones that are incorrectly identified as images. I suppose that's an enhancement request, so ignore as you must.
The way most OCR software works is that if you (right) click in an image zone, you get a context menu to clear that zone.