Scaler 2.7 not loading in FL Studio 20.9 (Mac)

I previously had a licensed copy of Scaler 2.5. I downloaded version 2.7 but installed it in a different folder, an external SSD drive. FL Studio now shows both versions in its list of plugins. However, even though I am picking the new version - based on the plugin path shown in the Manage Plugins screen - if I look at the Help menu for the loaded plugin, it always shows version 2.5. Is anyone able to tell me how to (a) Pick and run the new Scaler version 2.7, or (b) How to uninstall the older version so that only one is visible in FL Studio?