Just to give some more feedback for now: I've just downloaded and installed the installer on Windows7/64bit. After starting it I've got the first warning as mentioned. All works fine until this point.
Because I am behind a proxy here I cannot continue testing, I'll try to continue with it tonight. Thanks for working on this! Olaf -- Sent from: http://apache-flex-development.2333347.n4.nabble.com/