Flex插件版的下载地址
http://trials.adobe.com/Applications/Flex/FlexBuilder/3/FB3_WWEJ_Plugin.exe
Flex插件版的下载地址

将上面连接复制到迅雷，新建下载连接

2011-3-28下载成功

Eclipse Plug-in Windows简体中文版下载（403.3MB）：
http://trials.adobe.com/AdobeProducts/FLBR/4/win32/FlashBuilder_4_Plugin_LS10.exe

Eclipse 3.5 (eclipse-jee-galileo-SR2-win32) + FlashBuilder_4_Plugin_LS10 新建的Flex项目的路径不能有中文字符