Fire up those updaters!
A bug-fix update that adds support for macOS 10.14 was just pushed. Thanks again to all those early testers, and my sincerest apologizes to those of you who have been living in the Mojave betas, for as you clearly know, Espresso was unusable thanks to some nasty crashers.
Also, please note that while this update fixes those critical issues, it does not yet add support for Mojave's Dark Mode. Don't worry, I'm currently working to make Espresso really shine there, but it is going to take a little more time.
Thanks for your patience, and I hope you enjoy using Espresso in the Mojave betas!