Sorry for the late response due to the weekends.
As to the Blu-ray Creator, sorry to tell you that at the present version this software does not support ac3 dolby digital. Hope you can understand.
As to Blu-ray Ripper, we recommend you to select output format as MP4, AVI or MKV, then set the "Audio Codec" as "Audio Copy", then you can get 5.1 audio output.
Hope my suggestion will help you.
General purpose for Leawo Blu-Ray Ripper