Relogin from SETool2 or Supporter software and retry file download. You may use your favourite download manager as well.
Ensure your browser accepts cookies
If you have problems accesing support from Internet Explorer, please download and install Mozilla FireFox to your system, set it up as default system browser and try to enter support again.
If neither of the above helped you, please post a detailed description of your problem on official SETool support forum: