Kymograph_Analysis creates single csv. See #11909

See https://trac.openmicroscopy.org.uk/ome/ticket/11909

To test, draw diagonal ROI lines on 2 or more images (any single-Z & single-T images will do - don't have to be kymographs). Select the images and run Analysis Script -> Kymograph Analysis (in web or Insight). 
Should generate a single csv file that contains data from each line in each image.