Hello
First, I'm using mp3tag for years now and never said thank you for this great program, so I want to make up for that right away and say, Thank you very much for all the great work 
Second, I'm trying to export the lyrics from my mp3 files, so that there is one txt file for each mp3, but I didn't find an option for that. The only option I found is "One file per directory", so if I want to batch export all lyrics, I'd first have to make a folder for each mp3.
Perhaps there is a code for exporting one file per mp3? I'm using the following code now:
$filename("G:\MP3\_Lyrics_\\%artist%\"%artist% - %title%.txt)$loop(%_filename_ext%)%lyrics%
$loopend()