Thank you for the beta. It stops while processing the forth set of source images. You may or may not force-quit the beta -- System was locked up.

My images are 1600x1200 pix color uncompressed TIFF, 16 bit/channel, 20-30 per set.

I use Helicon Focus 3.61 Pro in Mac OS 10.5.2 on a 4-core Mac Pro, 8GB memory. After a certain number of image processing (often as few as 5 or 6), HF halts to process images and the progress bar would not go further. HF responds to clicking the Stop button and choosing Quit menu. After restarting H...