File associate problem

I’ve just ripped a DVD that I was wanting to back up and somehow the .VOB files have been associated to Power DVD and now when I try and use DVD shrink on them I get an error message.

I’ve tried uninstalling Power DVD but this had not done the trick, I’ve also tried associating them to DVD shrink but this does not work either, how do I get them back to just being plain .VOB files again?

Cheers.

start/my computer/tools/folder options/file types. scroll to vob, highlight it, click delete button.

or try rightclicking then select “open with” then browse for dd shrink and check “allways use this program to open this kind of file”