Based on this report, we recommend:

: For validation issues in Logic Pro, users recommend deleting the cache to force a fresh scan:

Go to ~/Library/Preferences and delete com.apple.audio.InfoHelper.plist . Restart your Mac and rescan plugins.

If a previous trial or installation is blocking your plugins, you must perform a deep clean:

Reddit's general consensus is that the Soundtoys 5 bundle is one of the few sets of plugins worth paying for due to its "analog soul" and longevity. www.reddit.com