The FAQ on backing up your configuration includes info on how to manually back it up if you're finding the normal config backup is crashing (which indicates something is quite wrong).
You could also try installing Opus over the top of itself, without uninstalling first. So long as you don't uninstall your config should be left alone (although it doesn't hurt to back it up anyway, just in case; it's only really one directory you need to make a copy of so it's quick & easy to do). That should ensure all components are installed and registered correctly.