Other than DvdReMake.log, saved project files, and configurations in the registry, none that I know of. You could search for DvdReMake in the registry and delete the whole key and restart the program. All your customized settings under Tools -> Options will be reset. But I doubt it will make much difference. Or you may have the situation that Dimad describes in doom9, try that and let us know how it works out.
btw, have you tried the test export or export modified files?