Plugin showing in plugin manager, but not in au instruments- logic pro X

Hi, I downloaded XLN audio plugin RC20, and it seems to have downloaded it correctly, because the plugin shows up inside the plugin manager and says that it passed the AU validation. However, it does not show up in the drop down menu of AU instruments, I cannot find where this plugin lives in logic. Why is it not showing up? Ive downloaded one other plugin (output arcade plugin) and it worked fine, but this one seems to not work...

I have tried:

-"Reset & rescan selection" in plugin manager

-Deleting the audio unit cache file in the cache folder in the MacOS library then restarting my computer.

-Deleting the .vst file from components, and reinstalling the plugin fresh

I am using a 2012 Macbook pro running catalina and Logic 10.4.7

Any ideas? Should I delete logic and reinstall? Help please!!

Thanks :)