I’ve thrown 6 or 7 hours at trying to get my Waves plugins to show up, after buying a few new ones, and then updating to v13. I have tried every solution I can find with intense googling, including totally uninstalling everything Waves-related and reinstalling, doing an install from an offline installer, deleting the blocklist cache in Cubase 11 folder, all of the usual deactivate / reactivate / maintenance tasks you can do in Waves Central, copied the Waveshell plugins to various other folders, rescanned plugins in Cubase, pointed the plugin manager at various Waves folders. There is seemingly no way to get Cubase 11 to recognise Waveshell as a thing that I desperately need to work tomorrow!!