We have updated the media downloader, please try this:
Be sure to install the air app first. Let us know if you still are experiencing issues after trying this version.
I'm sorry, but it still doesn't work... I'm not exactly sure why...
OK, I will investigate the error and your account and see how I can help.
This is a very specific case of some machines having problem with Air installation. I googled it and the closest i could get is to try installing an older Air version from here and see if that works.
Try with 3.5 runtime.
If it still doesnot work let me know. ill try getting more help on it.