Is it possible to make Leonardo appear as ttyUSBx rather than CDC ttyACMx ?

Data Explorer won't collect it's data because it expects ttyUSB , not ttyACM device. Is there a way to make 32u4 enumerate as ttyUSB ?

I think you can't just change the Leonardo, perhaps a symbolic link in linux. Or write the data to Serial1 and add an extra usb-serial module to Serial1.

yep, that's basically my conclusion as well, I did use symlink, and I still hope the author can make Data Recorder work with ttyACM.