I can't figure out VOB to WAV conversion - please help

I extracted the files from my Seal live concert DVD using DVD Decrypter. Got the VOB files and then from here I can’t seem to convert them to WAV. I tried using
Clier’s ac3 tool and when I went to ac3 extraction tab and put the vob file there and highlighted it I get a runtime error!!! Should I be using something else to get VOB to WAV??? Thanks

Try DVDx … load the VOB, set output tab->video codec to null, input tab-> audio to export AC3.

If you actually want stereo Audio, input tab-> audio is to use 48Khz, or High Quality 48Khz to 44.1Khz conversion. Make sure “export AC3” is turned off.
Then in the output tab audio->WAV.