Can I run multiple instances of DVD FAB?

Prior to upgrading to the latest version I used to launch 2 instances of DVD Fab Decrypter and rip two DVD’s (in different dvd drives) at the same time to different hard drives on my computer. This actually worked really great.

I tried it with my current version and when I went to start the second rip I got an error.

Does anyone know if I can use 2 instances of DVD Fab to rip 2 disks at a time? If so, what settings changes must I make? I tried changing the temp directory on DVD Fabs in different program files directory and the changes affected both copies.