Morning OF.
Yes support for SE officially ceased on 31st. Dec. 2007.
Updates are, however, still available as, according to the Lavasoft forums, the authors "recognised the sentimental attachment that some users had for the SE version".
These updates, however, have to be downloaded from the Lavasoft site and manually installed, no auto updating for it any more.
At the same time, the authors do recommend a change to Ad-Aware 2007, and no doubt the "sentimental" updates for SE will cease in time.