Defrag freespace crashes - dump attached

Latest version of Defraggler (2.00.230) downloaded and installed (and yes, I have made a donation :) ). Works as expected, except when I did a freespace defrag after a full "C:" defrag, the program just closed down, with no messages or on-screen error reporting. Dr. Watson did capture a dump and log, attached here.

drwtsn32_log.txt - renamed from drwtsn32.log as I am told I can't upload files of type ".log"

user_dmp.txt - renamed from user.dmp as I am told I can't uplod files of type ".dmp"

I hope this helps.

Was there a .dmp created in the installed folder?