Apple have announced that all third-party apps will need to be notarized in order to run on macOS 10.15. For this reason, I have had both Trigger and MenuBarTrigger notarized and available to download here:
I’m hoping that both these versions will work with 10.15, once it is released, but will update this post to confirm this once the golden release of our new friend Catalina is out. So far I have verified that everything works as expected in macOS 10.15 19A546D (beta 7) and macOS 10.14.3.
Update: they work 🙂