[U2Lynne]

What application are you using as your default DVD player?

As for changing the default... on my ancient PC, I got to Folder Options > File Types, find the type (BUP File) and then hit Edit, select the action and then edit it to open with VLC instead.

edit: There are no wav files associatied with that download. There are not any typical audio files that go with a DVD. All you need for a DVD download is a VIDEO_TS folder which will contain ifo, bup, and vob files and then you open your DVD player and select the VIDEO_TS folder and it should play the whole DVD (you should not open just an ifo/bup/vob file).