一些朋友安装使用了Flex Builder 3，输入了正确的注册码，但是发现Flex Builder图表组件水印依旧去除不掉，这是怎么回事呢？
icech找到一个解决的方法，与注册码是否正确无关。
1. On the Project menu, choose Build Automatically to turn off this option. If the option is already turned off (deselected), do not complete this step.
2. Choose Project > Clean.
3. Choose Project > Build.
4. (Optional) Choose Project > Build Automatically to turn on this option again, if desired.
更加具体的信息可以参考这里： http://www.adobe.com/go/kb404736