Defraggler see's my M.2 ssd as an HDD in the disc list and only gives me defragment option rather than optimize. I am using a Samsung PM 951 512 GB M.2 nvme ssd. It's mounted on an ASUS maximus 7 hero mother board in it's native m.2 slot. All other systems see this drive as an even windows 10 itself . The problem lies with Piriform....they need to update their software....this is a Defraggler Bug.