Had a go with 1.1.44 (BETA) and it seems to work fine. The ability to defragment a single, large file is potentially useful.
Couple of suggestions:
At the moment it can take a long time to respond to the [stop] command. If it is working on a big file, it seems to complete it before stopping - which can take some time (minutes in some cases). Windows defrag always stops instantly. It would be nice if Defraggler also responded straight away - presumably leaving the file it was working on in whatever semi-defragmented state it had got to.
Another option that would be useful would be t