We've just posted Alpha 20. We'll be posting release notes in a bit and updating them throughout the day (as usual).
If you want A20 right now, you can restart Logos 4 Mac and it should auto-update, or just type "Update now" into the command bar, or redownload it from www.logos.com/logos4mac.
Tom
P.S. This build will require a full reindex due to changes detecting non-bible resources which support Morph searches.