This page lets you access the current version of Acs Web Start as well as the different versions ordered by version number. In most cases, you will simply want to select the latest version. Older versions are of interest if i) either you maintain your own webstartable application that depends on a particular Acs Release, or ii) you find something in the latest version has disappeared or isn't working any longer. In the latter case please also send a mail to the Acs Team and let us know about it.
The latest version is always available here.
Acs Web Start versions are also available by version number. Older versions are kept for reference.
The address of a particular version follows the scheme
www.eso.org/alma/projects/AcsWebStart/X.Y
where X.Y is the Acs Release's major/minor number, e.g. 5.0.