If you are experiencing issues getting your plugins to load inside Reason, please try closing reason and deleting the __PluginDatabase.dat file located in the following location:
macOS: /Users/<Your_Name>/Library/Application Support/Reason/Caches
Note: This location is hidden by default. You will need to hold down the "Option" key on your keyboard within the Finder "Go" menu in order to access the User Library.
Windows: C:/Users/<Your_Name>/AppData/Local/Propellerhead Software/Reason
Note: This folder is hidden by default. Learn How To Show Hidden Folders