Certain Waves Plugins do not activate

Sounds like you need to load the new Waves Central App. When you do this, all the plugins will be refreshed, V10 or otherwise. This said,I think it might be best to contact Waves support because, depending on your DAW build and earlier versions of Wave Central, they will be able to point you to some files that need to be deleted. I recall I had something similar happen in the past and they walked me through the process.