Since tons of bugs have been fixed, 2.5 is the best version of AFS so far.
Changelog:

1. File system are deeply refractored. File and file stream operations are fully supported.
2. Add Window closing interception. Developers can prevent the closing of native windows.
3. More cookbook examples are provided. new examples include: MultiWindow, WindowStyle, ShellRun
   MultiWindow: inteprets the ability of mutiple window support.
   WindowStyle: custom window style support with flexmdi.
   ShellRun: Run local programs.
4. More powerful extension system.
5. full documention support.