You’ll need to clear out the plugins from your computer like mentioned before. Here is some info regarding location. I would say to delete all you can find (au of course, but also vst, aax, etc).
If you need to manually remove third-party Audio Units plug-ins, you can find the files in the Library folders on your Mac.
If you want to rescan your plugin library in Logic you can probably use this:
Learn what to do if you're using third-party Audio Units plug-ins and Logic Pro or MainStage isn't working properly, or if you can't find a recently installed plug-in.
EDIT: also, make sure your default project that loads when you first launch Logic does not have a track trying to use Granophyre.