By downloading, you agree to the license agreement at the top of this page.
From version 2.1 onwards, aa development will use subversion.
You may download the latest release (see directory "tags") or development (see "trunk") version from http://imaging.mrc-cbu.cam.ac.uk/svn/aa
Version 2.2 http://imaging.mrc-cbu.cam.ac.uk/svn/aa/versions/release-2.2/
It would probably be easiest for you to use subversion to take a copy of these repositories, for example with something like:
svn co http://imaging.mrc-cbu.cam.ac.uk/svn/aa/versions/release-2.2/
Version 2.0 is here: [ask] Version 1.2 is here: [ask] Version 1.1 is here: [ask]
Older versions are available from http://www.mrc-cbu.cam.ac.uk/~rhodri/aa/download.htm