ability to defrag multiple disc in parallel

Hello!

I have 3 physical discs (+ 1 SSD for windows) and I can't defrag them in the same time. Just removing the test in startup to be able to launch multiple instance would be nice. It will result in a faster defrag time because it's boring to queue tasks for defrag.

Many other defrag tools are able to do that, but I like defraggler.

Have a nice day!