Hi Christopher-
Can you try trashing the preferences file that governs the FX Browser? It’s stored in the following path:
/Users/”yourusername”/Library/Preferences/
It’s called:
com.borisfx.BCC.fxBrowser.ae.plist
Premiere must be closed while doing this.
To get to your library folder hold the option key and click on the “Go” menu in Finder, you will see Library listed as an option. Open the Preferences folder and delete the .plist file
Relaunch Premiere and let us know how it goes.