- Under Configuration/Options/Configuration, if the location of configuration files is not set to user home directory, change it to user home directory. You may set this back afterwards.
- Check all the checkboxes under Save on exit
- Close Double commander. Only when closing, all of the configuration files are saved.
- All the config files are now in the user home directory, under doublecmd.
- Copy these files.
You can even copy the files from Windows to Linux.