For one file only you can use this export script ...
(one text line) $filename(%_folderpath%%_filename%'.USLT.txt',UTF-8)$if(%UNSYNCEDLYRICS%,$regexp($regexp(%UNSYNCEDLYRICS%,'\A...\|.*\|(.+)\Z','$1'),'\A[\r\n\t]*|[\r\n\t]*\Z',),)The following thread leads to proposals from users, Dano and DetlevD, how to export unsyncedlyrics text for a bunch of files at once ...
/t/13645/1
DD.20121111.0832.CET