Logic Pro users often find that the plugin doesn't show up after an update. Go to ~/Library/Caches/AudioUnitCache/ . Move the files to the trash.
: Mac updates (like the shift to M1/M2 chips or macOS Catalina) often break old cracks, making them impossible to "fix" without a legitimate, updated installer.
: If the sound is too distorted or "crunchy," try trimming the input signal before it hits the plugin to prevent overdriving the built-in saturation model.