WonderPen 3

WonderPen 3 is a writing app for both professional and amateur writers.
Features
Tree view, drag-and-drop to reorder.
An easy-to-use text editor that supports Markdown.
Supports full-screen mode, lets you focus on writing.
Docs can be exported as Image, PDF, Word, HTML, etc.
Auto save while editing. You can backup all docs as a single file and restore from it later.
Add memo for each doc.
Focus on one node of the doc tree.
Search in all docs.
Automatic backup.

Installation Instructions:

Install app.
Go to prefs and ask to offline reg.
Open KG via terminal.
Run.
Copy offline code from app to Terminal.