FULL clean uninstall, upgrade 8 to 9 is messed up?

My upgrade from 8 did not go well, is their anyway to to a full clean uninstall and start over from scratch ?

Does the uninstaller not clean things up?

I wasn't sure if it would wipe out all the reg settings or if an extra -clean needs to be added to the un-installer.

The Opus 8 uninstall should clear out the registry. (The Opus 9 uninstall probably won't, since the Opus 9 install moves all the settings out of the registry, except for a few plugins that haven't been updated yet (mostly my fault!).)

Or you can do it by hand by deleting HKLM\Software\GPsoftware and the same under HKCU.