This is just an FYI post for anyone who bought SoA from SE via Digital River.
This is straight from an email I received from Digital River.
"All download products purchased through the Online Store have a period
of days in which you can complete the download. In the event the
download file needs to be accessed after this period of time, you may
have the option of purchasing the Extended Download Service. In
addition, we may also offer the option to purchase a Backup CD for the
downloadable software."
So make sure you back up those install files unless you feel like paying for the privilege of downloading something you already paid for the next time you need to re-install.