Now, XwaOptEditor.zip contains 2 versions:
XwaOptEditor runs on Windows 32/64 bits with the .NET framework 4.5.
(Windows Vista, Windows 7, Windows 8, or superior)
XwaOptEditor4 runs on Windows 32/64 bits with the .NET framework 4.0.
(Windows XP, Windows Vista, Windows 7, Windows 8, or superior)