No specific info about version 4.0. Please visit the main page of Notability on Mac Informer.
Best app in existence
Alternote is a simple app that helps you write notes on your computer.
Keep track of your daily notes directly from your Mac.
Syncs your notes on almost every device and supports strong encryption.
Boostnote is an open-sourced note app for programmers.
Tomboy is a desktop note-taking application for Mac OS X.
Best app in existence