I haven't migrated to Windows 8 yet, so I don't know if this feature is still there, but have you attempted to run it in a compatibility mode for an earlier version of Windows? Dundjinni's most recent version is older than Vista, I think, so it's going to be more and more difficult to get it to run.
You might also check at the Dundjinni users' forum. It's slow, but give it time; it is still there. We've never really had much of a Dundjinni presence here because those forums were so good.