I can find a version of flex 3 since the release of flex 4. Will flex 4 work with my old project files?
+1
A:
Yes... it will work. Just import your Flex 3 projects into Flex 4.
http://www.adobe.com/devnet/flex/articles/flexbuilder3_to_flashbuilder4.html
Vinothbabu
2010-05-29 09:21:57