You can export to .docx!
With your book open in Atticus, click "Export docx" in the Status Bar below the content editor to quickly and easily access the .docx version of your book.
You can also export to .docx from the Book Details page. To do this, open your book in Atticus, click Edit Book Details in the Main Menu Bar, and look for .Docx export on the right side.
Note: Word can’t display the complex coding Atticus uses to format and design your book, so it will only retain basic formatting, such as chapter titles and, of course, all your content. It’s ideal for editing and a backup version of your manuscript, but if you need a fully formatted version, you’ll have to export to either ePub or PDF.