FLStudio won't find them. I checked the Waves folder where all of my previous Waves plugins are located, and my new ones are installed there. And I even made the Waves folder a custom plugin search path in the Plugin ...
FL 20 was newer . Ended up uninstalling FL 20 and having to reinstall all Waves plugs because troubleshooting ended up affecting FL 12.5 as well , causing Wave Shell Wrappers . The Waves plugs that don't show up in FL 20 Plugin ...