Same problem with DVDFab9 not recognizing external BD drive

[acmdude]

I am running on an iMac with OS 10.8.4 and DVDFab 9 9.0.4.8. I use a Samsung SE506BB external BD Drive because Mac optical drives don't do BD. This problem occurred before and now it's back. I do a full movie copy (A Good Day To Die Hard"), then I do a Main Movie so it will fit on a BD25. Then I tell it to burn a BD25 and in the drop down menu I point it to the external drive (which DVDFab 9 recognizes, in fact that's what read in the original movie). When I press the Start button, the software tries to read the internal drive of the iMac, which of course isn't where the blank BD-R disk is. The internal drive couldn't read it anyway because Macs don't natively do BD. The DVDFab 9 software is ignoring my choice in the menu and I can't see anything to do about it. I've tried over and over.

Also, after each step when I click the "Finish" button, the DVDFab 9 9.0.4.8 aborts. I am attaching the logs.