I hate when that shit happens. Did you try a simple uninstall/reinstall? Like I said, my experience with DVD Shrink is pretty limited since I don't like compressing the source unless it's absolutely necessary.
I have a program that I paid like $20 for a long time ago called CopyToDVD mainly for it's .bin capabilities. It won't burn .iso files (only .vob), but maybe they've updated over time. The major down side is that it WON'T copy any copy-protected DVDs. Slysoft's AnyDVD might work. Maybe CloneDVD. You'll eventually have to pay for it, though. Most DVD copy stuff is trialware at best. Just go over to
www.videohelp.com or
www.doom9.org for listings of programs. Videohelp is especially good since it has all of the tutorials on how to use the stuff once you've got it and has great program reviews, download mirrors, and product info.