Batch Conversion Join Dual Mono to stereo?

Hi Guys,
thanks for your great work !!
Just one thing:
How can I select multiple .L and .R files
and convert them to a stereo file ?
If I select only one pair it works…

Thanks for your answer
Hans

Sorry, that’s not possible. It turns out to be tricky because you cannot trust right and left channel filenames to match correctly.