I know that some of you asked for the answers to be removed from the old site, but I could never get that to work. However, I have now been able to do that by creating .zip files corresponding to the years for the tournament. Each year's .zip file has all five tests and keys plus the ciphering for all five levels.
In order to unzip the files, you will need an extractor such as WinZip or WinRar, which if you do not already have on your computer, you may download from Tucows for free. The files inside the .zip files are .pdf files, so you will also need Adobe Reader, available at Adobe.
Also in order to unzip the files, you will need the password for the files. Because teachers would like to use these old tests as practice in the classroom, the passwords are only available to teachers and will only be sent to e-mail addresses affiliated with schools. Sorry to have to do this, but if you have other suggestions, I'd be willing to entertain them.
Here are the .zip files for all previous tournaments up to this point:
1996, 1997, 1998, 2000, 2001, 2003, 2005, 2006, 2007, 2008, 2009, 2010, 2011