Issue while upgrading the GrEclipse plug-in

I upgraded my GrEclipse plug-in today to a newer version. The upgrade URL is given in this page. Since it was an upgrade, I click on Help -> Check for updates in Eclipse. Immediately I got the following error:

Cannot complete the install because of a conflicting dependency.
  Software being installed: Groovy-Eclipse Feature 2.0.0.xx-20091211-1000-e35 ( 2.0.0.xx-20091211-1000-e35)
  Only one of the following can be installed at once:
    JDT Core patch for Groovy-Eclipse plugin 2.0.0.xx-20091017-2200-e35 (org.codehaus.groovy.jdt.patch.feature.jar 2.0.0.xx-20091017-2200-e35)
    JDT Core patch for Groovy-Eclipse plugin 2.0.0.xx-20091211-1000-e35 (org.codehaus.groovy.jdt.patch.feature.jar 2.0.0.xx-20091211-1000-e35)
... and a lot more ...
To recover from the error, I just uninstalled the version of JDT that was conflicting. To do this, click on Help -> Install New Software and click on the "What is already installed?" link at the bottom of the dialog. You can easily locate the old JDT and uninstall it.



There was a problem with M1 in that if you installed it with the wrong options, you could not do a "Check for updates", This has been fixed in M2, but you must uninstall first. See the FAQ:

Also, there is an Eclipse bug open for it:

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