I tried several times scans with using groups.
Now it finds 165 doublettes, but the ALL files in group2 do not exist.
The logs show that those files were not opened. I do not know why they were scanned, as they do not exist as file.
This scan took me almost a week now because several times Silarity just froze... and I had to restart.
Also I still do not know which order and configuration for the decoders is most robust.
Any idea?