jammed eclipse after installing some blackberry plugin - blackberry-eclipse-plugin

Question

I have made the blunder not to back up eclipse before installing some old Blackberry plugin over it. Now it would not start, showing an error message box: "An error has occurred. See the logfile C:\eclipse...."
Logfile first few lines read:
!SESSION 2011-02-15 19:46:31.828 -----------------------------------------------
eclipse.buildId=I20090611-1540
java.version=1.6.0_23
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=en_US
Framework arguments: -product org.eclipse.epp.package.java.product
Command-line arguments: -os win32 -ws win32 -arch x86 -product org.eclipse.epp.package.java.product
!ENTRY org.eclipse.equinox.simpleconfigurator 4 0 2011-02-15 19:46:32.703
!MESSAGE
!STACK 0
org.osgi.framework.BundleException: The bundle could not be resolved. Reason: Another singleton version selected: org.eclipse.equinox.simpleconfigurator_1.0.101.R35x_v20090807-1100
at org.eclipse.osgi.framework.internal.core.AbstractBundle.getResolverError(AbstractBundle.java:1313)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.getResolutionFailureException(AbstractBundle.java:1297)
at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:309)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.resume(AbstractBundle.java:370)
at org.eclipse.osgi.framework.internal.core.Framework.resumeBundle(Framework.java:1068)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:557)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.incFWSL(StartLevelManager.java:464)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:248)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:445)
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:220)
at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:330)
!ENTRY org.eclipse.osgi 4 0 2011-02-15 19:46:32.703
!MESSAGE Bundle initial#reference:file:plugins/org.eclipse.equinox.simpleconfigurator_1.0.100.v20090520-1905.jar/ was not resolved.
!ENTRY org.eclipse.osgi 4 0 2011-02-15 19:46:32.703
!MESSAGE Application error
!STACK 1
java.lang.IllegalStateException: Unable to acquire application service. Ensure that the org.eclipse.core.runtime bundle is resolved and started (see config.ini).
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:74)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:368)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:559)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514)
at org.eclipse.equinox.launcher.Main.run(Main.java:1311)
There is also another logfile - made at blackberry plugin installation reporting
Installation: Successful.
1073 Successes
0 Warnings
0 NonFatalErrors
0 FatalErrors
and containing 1073 files it has added to the preexistent installation. It does not say anything to any cfg file modifications or such. Any way I can, maybe, revert the plugin installation based on that logfile ? Any other tip ?
Thank you!

Answer 1

If you exactly know which plugins/features is causing the problem, you can try to manually delete files related to them in %ECLIPSE_INSTALL%\plugins and %ECLIPSE_INSTALL%\features. You should backup your files before deleting!
Personally, I would reinstall Eclipse from scratch, debugging that can be time consuming!

Answer 2

Remove the folder from the plugins directory and restart eclipse.