Based on old and new LINX info LabVIEW 2019 and earlier should use old LINX. New LINX should be used beginning from LabVIEW 2020.
As I see VI package manager shows both LINXs for LabVIEW 2020 pro. I was able to install, load LINX into Arduino Leonardo and run examples of old LINX but I wasn't able to load new LINX.
I used Windows 10 Pro on UDOO X86 Ultra UDOO board.