The Installation Guide is for people who are installing the Atlassian Connector for Eclipse for the first time. Check the system requirements and install the connector. You may also find the Configuration Guide and FAQ useful.
The Upgrade Guide is for people who are upgrading their connector to the latest version.
This is an open source project. To access the connector's source code, go to
https://bitbucket.org/atlassian/connector-eclipse. If you do not already have an account, please go to
https://bitbucket.org/ and sign up for an account. You should then be able to access the Mercurial (Hg) repository with your new account. You may also find the Atlassian Answers forum useful.