You can export/import the lists of duplicates and unlike images
to/from text files. For that, select the item
"Export[Import] image lists to[from] text file" in the
main or contextual
menu, set the type of operation (export or import), the type of list
(duplicates or unlike images), the text file name, options of
export/import in the opened dialog, then press the button "OK".
The text file format is the following: each line in the file
corresponds to one group of duplicates or unlike images, image names
are separated by a symbol selected in the dialog. If the option
"use full path" is set, path to each image file rather than
its name only will be written into the text file. If the option
"use value of difference" is set, the value of difference of images
in group will be written at the beginning of each line. If
the option "process only available (on-line) files" is set,
the images absent on the data medium (off-line) will be unfiled.