Preferences are exported by type via the Yate>Export Preferences... menu item. Basically, you name a file to receive the output and select which item types to export.
When everything is selected, you're exporting all of Yate's preferences. You can remove whatever item types you don't want to export. The Settings element refers to all of Yate's settings not represented elsewhere in the list. This includes all individual preferences, the open/close mode for the main window list of files and the visibility and position of columns in the file list. Individual items may be exported via the Export button found in most preference panels.