Seems as if the Flex SDK downloads on the Adobe SourceForge page (http://sourceforge.net/adobe/flexsdk/wiki/Downloads/) aren’t working so I decided to archive my own copies in the mean time.  Figured this might help others have download issues until Adobe fixes the links.

Download -> Flex 3.6.0.16995

Download -> Flex 4.1.0.16076

Download -> Flex 4.5.1.21328

Download -> Flex 4.6.0.23201

Adobe also has an archived page for AIR SDKs at http://helpx.adobe.com/air/kb/archived-air-sdk-version.html 

Update: It appears as if Adobes Flex SDK downloads are working again. I’m including those links here, but still keeping mine…just in case.

Adobe Flex 4.6.0 page : http://sourceforge.net/adobe/flexsdk/wiki/Download%20Flex%204.6/

Adobe Flex 4.5.1 page: http://sourceforge.net/adobe/flexsdk/wiki/Download%20Flex%204.5/

Adobe Flex 4.1 page: http://sourceforge.net/adobe/flexsdk/wiki/Download%20Flex%204/

Adobe Flex 3.6 page: http://sourceforge.net/adobe/flexsdk/wiki/Download%20Flex%203/