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 ...
FL are old. I don't know if it's reasonable to ask for an "HQ" option in Waveshaper, Love philter, and Sytrus, that computes the transfer function/audio signal with a higher bit depth -- perhaps even 32 bit floating point ...