https://vovsoft.com/software/tree-notes/
Vovsoft Tree Notes is a hierarchical note-taking application designed to enhance your organizational efficiency and streamline your information management process.
This powerful software provides users with a user-friendly platform to create, organize, and access their notes effortlessly.
Supports: 
Windows 11, Windows 10, Windows 8/8.1, Windows 7, Windows Vista, Windows XP (32-bit & 64-bit)
Giveaway link –> (License code + Download)
https://vovsoft.com/giveaway/free-tree-notes-2024/
Lifetime license
No free updates