I was interested in Decloner so I downloaded the trial version. After analyzing the files on my drobo overnight, I started to mark some files for deletion when it decided to crash.
Sorry about that. Did it crash the moment you marked a file for deletion, or when you started scan? Can you try it with files on your internal drive, as opposed to Drobo, and see if it still crashes? Another thing to try is to enable logging it Decloner preferences, let it crash, and email me the log file (or a few dozen last lines if it is too big) that should appear in a folder on your desktop (or wherever you choose in the preferences).
It crashed as Decloner was moving the files to the trash to be deleted. Actually, it has done that several times now. I've just now enable logging. I'll email you the next crash log.