An update site is a software repository used by Eclipse for provisioning new features or updating the existing ones.
This is the recommended version of the Safe X3 Studio plug-in, visit the 2.1 update site
This version supersedes the 1.2 and 2.0 version.
If you are looking for old release, visit the 1.2 and 2.0 update sites.
These versions are no longer supported.