I downloaded and installed the latest STS version for windows 7 64bit, using the installer (not the zip file). When I went to add some extensions I discovered that there were quite a few missing. Some of the missing extensions include grails, grails support, and groovy eclipse.
Why aren't these extensions showing up?
Maybe you are behind a firewall/proxy, so that the extension listing cannot be downloaded correctly. What extensions are showing up on the dialog? Can you check the proxy settings within STS/Eclipse?
apparently windows 7 firewall was blocking them.
Glad to hear that it works now!