Well, in case you just upgraded from Snow Leopard to Mavericks (like we did ;-) ) and your Waves plugins don’t behave as expected a new installation of Waves could make sense, but first things first. A proper uninstallation does not always work entirely well with Waves’ uninstaller. So in case something goes wrong, follow these steps for manual uninstallation:
1. Delete the main Waves folder
located at /Applications.
2. Delete the Waves Preferences folder
located at /Users/Your User/Library/Preferences
3. Delete the Waveshell files from these locations: