Following instructions at http://www.springsource.com/download...oogle-download, I'm told:
After downloading and installing STS 2.3.3, use the "Extensions" tab to install GPE and DN
I check them both off and click the Install button, but when STS restarts they still appear unchecked in the Extensions tab. Trying to install them again results in an error:
Cannot complete the request. See the error log for details.
"DataNucleus Eclipse Plugins" will be ignored because it is already installed.
...
Still they appear un-checked in the Extensions tab. Clicking the "Configure Extensions..." link shows only Roo and Maven under Spring > Auto Configuration. Installed Software tab of Installation Details shows both DN and GPE installed.

Am I doing something wrong? I'm not yet able to get the rest of the hello-world example on that download page to run. I enter the commands in the Roo shell, then right-click the project and point to Run As, but "Web Application" isn't in the list.

I have the same problem on Windows 7 and Ubuntu 10.04, both x64.