I find release 1.9 either crashes or freezes. I'm using the release 1.9 on Windows 10 PC with latest is OS upgrade.
It continually goes to a white screen or just locks up and I have to restart my computer. I have tried focus merge with 10 raw files and the program just freezes. I then turned the raw files to jpg but after about 5 files the program locks up.when I finally got 10 jpg files after having to restart my computer the resulting focus merge image was black on the bottom quarter of the frame
I reinstalled version 1.8.5 and everything works fine and focus merge using raw files works perfectly.