Welcome to the ACDT Release 3.1.0 update site. Only this special release is available here.
To install the release, from the Update Manager, create a Site Bookmark that points to the following URL:
http://acdt.aspectc.org/builds/3.1.0
Open the bookmark and select the ACDT features to install.
Alternatively download the ZIP file that contains a copy of this update site, save it somewhere in your local filesystem, and use the Update Manager to install the ACDT from this "Archived Update Site".
The Install/Update wizard is opened by selecting Help/Software Updates/Find and Install ...