This is a minor update that focusses on improving behavior on macOS Big Sur. For a complete list of changes see the full release notes.This is a free update for existing users of Nisus Writer Pro version 3. The update is available everywhere: the automatic updater (inside the app), direct download, or the Mac App Store.
If you missed the prior version (3.2) of Nisus Writer Pro, please see the What's New page.