1) Inside the projects window expand the suite and modules directory
2) Right click on the project you would like to remove
3) Select Remove
4) Exception window appears.

% ./netbeans/bin/nb.exe -J-Dnetbeans.logger.console=true
-------------------------------------------------------------------------------
>Log Session: Thursday, August 24, 2006 10:30:06 AM PDT
>System Info:
  Product Version         = NetBeans 5.5 Dev (Build 060821)
  Operating System        = Windows XP version 5.1 running on x86
  Java; VM; Vendor; Home  = 1.5.0_07; Java HotSpot(TM) Client VM 1.5.0_07-b03;
Sun Microsystems Inc.; C:\Program Files\Java\
  System Locale; Encoding = en_US (nb); Cp1252
  Home Dir.; Current Dir. = C:\Documents and Settings\joelle;
c:\users\js138578\mako9\src\ravebuild
  Installation; User Dir. =
C:\users\js138578\mako9\src\ravebuild\netbeans\nb5.5;C:\users\js138578\mako9\src\ravebuild\netbe
\js138578\mako9\src\ravebuild\netbeans\harness;c:\users\js138578\mako9\src\ravebuild\netbeans\platform6;
C:\Documents and Se
  Boot & Ext. Classpath   = C:\Program
Files\Java\jdk1.5.0_07\jre\lib\rt.jar;C:\Program
Files\Java\jdk1.5.0_07\jre\lib\i18n.
s\Java\jdk1.5.0_07\jre\lib\jsse.jar;C:\Program
Files\Java\jdk1.5.0_07\jre\lib\jce.jar;C:\Program Files\Java\jdk1.5.0_07\jre\
les\Java\jdk1.5.0_07\jre\lib\ext\dnsns.jar;C:\Program
Files\Java\jdk1.5.0_07\jre\lib\ext\localedata.jar;C:\Program Files\Jav
_07\jre\lib\ext\sunpkcs11.jar
  Application Classpath   =
c:\users\js138578\mako9\src\ravebuild\netbeans\platform6\lib\boot.jar;c:\users\js138578\mako9\sr
\mako9\src\ravebuild\netbeans\platform6\lib\org-openide-util.jar;C:\Program
Files\Java\jdk1.5.0_07\lib\dt.jar;C:\Program Fil
  Startup Classpath       =
C:\users\js138578\mako9\src\ravebuild\netbeans\platform6\core\core.jar;C:\users\js138578\mako9\s
138578\mako9\src\ravebuild\netbeans\nb5.5\core\org-netbeans-upgrader.jar;C:\users\js138578\mako9\src\ravebuild\netbeans\nb5.
7\core\org-netbeans-modules-utilities-cli.jar
-------------------------------------------------------------------------------
Turning on modules:
        org.openide.util [6.8.21 060821]
        org.openide.modules [6.5.21 060821]
        org.netbeans.modules.xml.xam/1 [1.1.20 1 060821]
        org.netbeans.modules.xml.schema.model/1 [1.1.20 1 060821]
        org.openide.awt [6.7.21 060821]
        org.openide.filesystems [6.4.21 060821]
        org.openide.dialogs [6.5.21 060821]
        org.openide.nodes [6.7.21 060821]
        org.openide.windows [6.5.21 060821]
        org.openide.options [6.4.21 060821]
        org.openide.text [6.9.21 060821]
        org.openide.explorer [6.5.21 1 060821]
        org.openide.actions [6.5.21 060821]
        org.openide.loaders [5.9.21 060821]
        org.netbeans.bootstrap/1 [2.3.21 060821]
        org.netbeans.api.progress/1 [1.5.21 060821]
        org.netbeans.core.startup/1 [1.5.21 060821]
        org.netbeans.swing.plaf [1.5.21 060821]
        org.netbeans.core/2 [3.2.21.1 060821]
        org.netbeans.modules.autoupdate/1 [2.16.21 060821]
        org.netbeans.modules.queries/1 [1.7.21 060821]
        org.netbeans.modules.projectapi/1 [1.9.21 060821]
        org.netbeans.modules.favorites/1 [1.11.21 060821]
        org.netbeans.core.ui/1 [1.9.21 060821]
        org.openidex.util/3 [3.9.21 060821]
        org.apache.xml.resolver [1.1.20 1.1 060821]
        org.netbeans.api.xml/1 [1.13.20 060821]
        org.netbeans.spi.navigator/1 [1.2.21 060821]
        org.openide.io [1.9.21 060821]
        org.netbeans.core.output2/1 [1.7.21.1 1 060821]
        org.netbeans.modules.xml.core/2 [1.12.20.4 4 060821]
        org.netbeans.modules.xml.catalog/2 [1.11.20.4.4 4 060821]
        org.netbeans.modules.masterfs/1 [1.8.22 060821]
        org.netbeans.modules.projectuiapi/1 [1.13.21.5 5 060821]
        org.openide.execution [1.8.21 060821]
        org.netbeans.core.execution/1 [1.9.21 060821]
        org.netbeans.modules.projectui [1.7.21.5 060821]
        org.netbeans.modules.editor.util/1 [1.8.21 060821]
        org.netbeans.modules.editor.mimelookup/1 [1.3.21 060821]
        org.netbeans.modules.editor.fold/1 [1.5.21 060821]
        org.netbeans.modules.editor.lib/1 [1.9.21.1 1 060821]
        org.netbeans.modules.javahelp/1 [2.8.21 060821]
        org.netbeans.modules.diff/1 [1.15.21.42 42 060821]
        org.netbeans.modules.editor.settings/1 [1.4.21 060821]
        org.netbeans.modules.editor/3 [1.26.21.1 060821]
        org.netbeans.modules.editor.completion/1 [1.6.21 060821]
        javax.jmi.reflect/1 [1.7.21 060821]
        org.netbeans.jmi.javamodel/2 [1.21.21 060821]
        org.netbeans.api.mdr/1 [1.4.21 060821]
        org.netbeans.modules.classfile/1 [1.18.21 060821]
        javax.jmi.model/1 [1.7.21 060821]
        org.netbeans.modules.jmiutils/1 [1.5.21.2 2 060821]
        org.netbeans.modules.mdr/1 [1.5.21.2.2 2 060821]
        org.netbeans.api.java/1 [1.10.21 060821]
        org.netbeans.modules.javacore/1 [1.18.21.2.2 060821]
        org.netbeans.modules.schema2beans/1 [1.15.20 060821]
        org.netbeans.modules.project.libraries/1 [1.13.21 060821]
        org.netbeans.modules.j2ee.metadata [1.0.21 060821]
        org.netbeans.modules.websvc.jaxws20/1 [1.1.21 060821]
        org.jdesktop.layout/1 [1.3.21 1.0 060821]
        org.netbeans.libs.formlayout/1 [1.2.21 1 060821]
        org.netbeans.modules.options.api/0 [1.3.21 060821]
        org.apache.tools.ant.module/3 [3.24.21.1 1 060821]
        org.netbeans.modules.java.platform/1 [1.7.21 060821]
        org.netbeans.modules.project.ant/1 [1.12.21 060821]
        org.openide.src [1.8.21 060821]
        org.netbeans.modules.editor.errorstripe.api/1 [2.2.21.1 1 060821]
        org.netbeans.modules.java/1 [1.25.21.2.2.2 2 060821]
        org.netbeans.modules.java.project/1 [1.8.21 060821]
        org.netbeans.modules.editor.structure/1 [1.12.20.1 1 060821]
        org.netbeans.modules.xml.text/2 [1.12.20.4.4 4 060821]
        org.netbeans.modules.xml.retriever/1 [1.0.10 060821]
        org.netbeans.modules.websvc.jaxwsmodel/1 [1.0.20 060821]
        org.netbeans.modules.websvc.clientapi [1.5.20 060821]
        org.netbeans.api.web.webmodule [1.7.20 060821]
        org.netbeans.libs.xerces/1 [1.8.22 2.8.0 060821]
        org.netbeans.modules.j2ee.dd/1 [1.8.20.2 2 060821]
        org.netbeans.modules.j2ee.api.ejbmodule [1.6.20 060821]
        org.netbeans.modules.j2ee.dd.webservice [1.4.20 060821]
        org.netbeans.modules.websvc.websvcapi [1.5.20 060821]
        org.netbeans.modules.java.editor.lib/1 [1.4.21 060821]
        org.netbeans.modules.editor.codetemplates/1 [1.2.21 060821]
        org.netbeans.modules.java.editor/1 [1.4.21 060821]
        org.netbeans.modules.j2eeapis/1 [1.7.20 060821]
        org.netbeans.modules.settings/1 [1.10.31 060821]
        org.netbeans.spi.viewmodel/2 [1.9.21 060821]
        org.netbeans.api.debugger/1 [1.7.21 060821]
        org.netbeans.api.debugger.jpda/2 [2.4.21 060821]
        org.netbeans.modules.j2eeserver/4 [1.19.20.1 1 060821]
        org.netbeans.modules.websvc.jaxwsapi [1.0.20 060821]
        org.netbeans.modules.db/0 [1.19.20.4 4 060821]
        org.netbeans.modules.j2ee.common/1 [1.11.20 060821]
        org.netbeans.modules.xml.xdm/1 [1.1.20 1 060821]
        org.netbeans.modules.websvc.registry [1.4.20 060821]
        org.netbeans.modules.websvc.core [1.6.20.1.4 1 060821]
        org.netbeans.libs.glassfish_logging/1 [1.0.10 1 060821]
        org.netbeans.modules.editor.hints/1 [1.9.21.1 1 060821]
        org.netbeans.modules.servletjspapi/1 [1.0.20 1 060821]
        org.netbeans.modules.web.jspparser/2 [2.6.20 060821]
        org.netbeans.modules.editor.plain.lib/1 [1.3.21 060821]
        org.netbeans.modules.html.editor.lib/1 [1.5.20 060821]
        org.netbeans.modules.html.editor/1 [1.5.20 060821]
        org.netbeans.modules.web.core.syntax/1 [1.23.20 060821]
        org.netbeans.modules.web.struts/1 [1.3.20.1 1 060821]
        org.netbeans.spi.palette/1 [1.5.21 060821]
        org.netbeans.core.multiview/1 [1.8.21 060821]
        org.netbeans.modules.form/2 [1.19.21 1 060821]
        org.netbeans.modules.properties/1 [1.17.21 060821]
        org.netbeans.modules.i18n/1 [1.20.21 060821]
        org.netbeans.modules.i18n.form/2 [1.18.21 060821]
        org.netbeans.modules.editor.settings.storage/1 [1.4.21 060821]
        org.netbeans.modules.options.editor/1 [1.2.21 060821]
        org.netbeans.modules.properties.syntax/1 [1.17.21 060821]
        org.netbeans.modules.j2ee.genericserver [1.5.20 060821]
        org.netbeans.libs.jsch/1 [1.4.21 0.1.24 060821]
        org.netbeans.tasklistapi/1 [1.20.21.7 7 060821]
        org.netbeans.modules.welcome/1 [1.10.22 060821]
        org.netbeans.modules.beans/1 [1.17.21 060821]
        org.netbeans.swing.tabcontrol [1.6.21 060821]
        org.netbeans.modules.refactoring/1 [1.20.21.3.2 3 060821]
        org.netbeans.modules.junit/2 [2.19.22 060821]
        org.netbeans.modules.dbapi [1.2.20.4 060821]
        org.netbeans.modules.j2ee.persistenceapi/1 [1.0.20 060821]
        org.netbeans.modules.xml.multiview/1 [1.5.20.2 2 060821]
        org.netbeans.modules.dbschema/1 [1.8.20.3.4 3 060821]
        org.netbeans.modules.j2ee.persistence [1.1.20.1.2 1 060821]
        org.netbeans.modules.j2ee.verification [1.0.20 060821]
        org.netbeans.modules.j2ee.ejbcore [1.5.20 060821]
        org.netbeans.modules.j2ee.ejbjarproject [1.5.20 060821]
        org.netbeans.modules.ant.browsetask [1.11.21 060821]
        org.netbeans.modules.j2ee.clientproject [1.0.20.1 1 060821]
        org.netbeans.modules.web.project [1.5.20 060821]
        org.netbeans.modules.j2ee.earproject [1.6.20 060821]
        org.netbeans.modules.image/1 [1.17.21 060821]
        org.netbeans.modules.derby [1.7.21 060821]
        org.netbeans.modules.j2ee.samples [1.0.10 060821]
        org.netbeans.spi.debugger.ui/1 [2.8.21 060821]
        org.netbeans.modules.ant.debugger/1 [1.7.21.1 060821]
        org.netbeans.modules.tasklist.core/2 [1.37.21.16.7 16 060821]
        org.netbeans.core.ide/1 [1.9.21 060821]
        org.netbeans.modules.xml.tax/2 [1.12.20.4.4 4 060821]
        org.netbeans.modules.xml.tools/2 [1.12.20.4.4.4 4 060821]
        org.netbeans.modules.java.j2seplatform/1 [1.6.21.2 2 060821]
        org.netbeans.modules.css/2 [1.12.20 060821]
        org.netbeans.modules.j2ee.sun.dd/1 [1.6.20 060821]
        org.netbeans.modules.editor.errorstripe/2 [2.2.21.1.1 1 060821]
        org.netbeans.modules.versioning/1 [1.3.21.1 1 060821]
        org.netbeans.lib.cvsclient/1 [1.14.21 060821]
        org.netbeans.modules.versioning.system.cvss/1 [1.7.21.1.42.1 1 060821]
        org.netbeans.modules.web.core/1 [1.26.20.42.2 42 060821]
        org.netbeans.modules.debugger.jpda/2 [1.16.21 060821]
        org.netbeans.modules.debugger.jpda.ui/1 [1.5.21 060821]
        org.netbeans.modules.xml.wsdl.model/1 [1.1.20 1 060821]
        org.netbeans.modules.servletapi/1 [1.10.20 060821]
        org.netbeans.modules.httpserver/2 [2.6.20.42 42 060821]
        org.netbeans.modules.j2ee.sun.appsrv/1 [1.4.20 1 060821]
        org.netbeans.modules.debugger.jpda.ant [1.7.21 060821]
        org.netbeans.modules.java.j2seproject [1.6.21.42 42 060821]
        org.netbeans.modules.suggestions_framework/2 [1.15.21.9.16.7 9 060821]
        org.netbeans.modules.web.debug/1 [2.9.20 060821]
        org.netbeans.modules.j2ee.weblogic9/1 [1.5.20 060821]
        org.netbeans.modules.java.examples/1 [1.5.21 060821]
        org.netbeans.modules.apisupport.ant [2.30.22 060821]
        org.netbeans.modules.xsl/1 [1.12.20.4 060821]
        org.netbeans.modules.usersguide/1 [1.19.21 060821]
        org.netbeans.modules.javadoc/1 [1.18.21 060821]
        org.netbeans.modules.j2ee.sun.ddui/1 [1.7.20 1 060821]
        org.netbeans.modules.j2ee.sun.appsrv81/1 [1.2.20.1.1 1 060821]
        org.netbeans.modules.j2ee.blueprints/1 [1.10.20 060821]
        org.netbeans.modules.apisupport.project [1.12.22.6.4 6 060821]
        org.netbeans.modules.j2ee.ant [1.8.20.1 060821]
        org.netbeans.modules.extbrowser/1 [1.10.20 060821]
        org.netbeans.modules.editor.plain/1 [1.3.21 060821]
        org.netbeans.modules.java.navigation/1 [1.2.21 060821]
        org.netbeans.modules.web.examples/1 [1.6.20 060821]
        org.netbeans.modules.apisupport.refactoring [1.3.22.6 060821]
        org.netbeans.modules.db.core [1.3.20 060821]
        org.netbeans.modules.db.sql.editor [1.3.20.4 060821]
        org.netbeans.modules.web.monitor/1 [1.16.20 060821]
        org.netbeans.modules.websvc.customization [1.0.20 060821]
        org.myorg.googletoolbar [1.0 060823]
        org.netbeans.modules.html/1 [1.20.20 060821]
        org.netbeans.modules.j2ee.ddloaders/1 [1.7.20.2.2 060821]
        org.netbeans.modules.tasklist.docscan/2 [1.23.21.9.16.7 060821]
        org.netbeans.modules.utilities/1 [1.21.21 060821]
        org.netbeans.modules.j2ee.archive [1.0.28 060821]
        org.netbeans.modules.ant.freeform/1 [1.10.21 060821]
        org.netbeans.modules.java.freeform/1 [1.5.21 060821]
        org.netbeans.modules.j2ee.ejbfreeform [1.7.20 060821]
        org.netbeans.modules.websvc.jaxrpc16/1 [1.3.20 060821]
        org.netbeans.modules.j2ee.toplinklib/1 [2.7.21 060821]
        org.netbeans.modules.websvc.dev/1 [1.6.20.1 060821]
        org.netbeans.modules.clazz/1 [1.19.21 060821]
        org.netbeans.modules.tomcat5/1 [1.8.20 060821]
        org.netbeans.modules.tomcat5.bundled/1 [1.6.21 060821]
        org.netbeans.modules.xml.schema/1 [1.12.20.4 060821]
        org.netbeans.modules.apisupport.feedreader/1 [1.3.22 060821]
        org.netbeans.modules.j2ee.refactoring/1 [1.6.20.1.42.1 060821]
        org.netbeans.modules.defaults/1 [1.2.21 060821]
        org.netbeans.modules.j2ee.debug/1 [1.4.20 060821]
        org.netbeans.upgrader [4.5.21 060821]
        org.netbeans.modules.java.hints/1 [1.10.21.1 1 060821]
        org.netbeans.modules.web.jsf/1 [1.3.20.1 1 060821]
        org.netbeans.core.windows/2 [2.7.21.1 060821]
        org.netbeans.modules.web.jstl11/1 [2.7.20 1.1.2 060821]
        org.netbeans.modules.utilities.project/1 [1.5.21 060821]
        org.netbeans.modules.ant.grammar/1 [1.14.21 060821]
        org.netbeans.modules.j2ee.platform/1 [1.4.20 060821]
        org.netbeans.modules.j2ee.jboss4/1 [1.5.20.1 060821]
        org.netbeans.modules.web.freeform [1.5.20 060821]
        org.netbeans.modules.updatecenters/1 [1.6.21 060821]
        org.netbeans.modules.editor.bookmarks/1 [1.3.21 060821]
        org.netbeans.modules.apisupport.paintapp [1.0.21 060821]
*********** Exception occurred ************ at 10:32 AM on Aug 24, 2006
java.lang.ClassCastException:
org.netbeans.modules.apisupport.project.NbModuleProject
        at
org.netbeans.modules.apisupport.project.ui.customizer.SuiteUtils.findSuite(SuiteUtils.java:428)
        at
org.netbeans.modules.apisupport.project.ui.customizer.SuiteUtils$1.run(SuiteUtils.java:87)
        at org.openide.util.Mutex.readAccess(Mutex.java:266)
        at
org.netbeans.modules.apisupport.project.ui.customizer.SuiteUtils.getDependentModules(SuiteUtils.java:84)
        at
org.netbeans.modules.apisupport.project.ui.SuiteLogicalView$RemoveSuiteComponentAction.performAction(SuiteLogical
        at
org.openide.util.actions.NodeAction$DelegateAction$1.run(NodeAction.java:537)
        at
org.netbeans.modules.openide.util.ActionsBridge.doPerformAction(ActionsBridge.java:53)
        at
org.openide.util.actions.NodeAction$DelegateAction.actionPerformed(NodeAction.java:533)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1849)
        at
javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2169)
        at
javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
        at javax.swing.AbstractButton.doClick(AbstractButton.java:302)
        at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1000)
        at
javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1041)
        at java.awt.Component.processMouseEvent(Component.java:5488)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3126)
        at java.awt.Component.processEvent(Component.java:5253)
        at java.awt.Container.processEvent(Container.java:1966)
        at java.awt.Component.dispatchEventImpl(Component.java:3955)
        at java.awt.Container.dispatchEventImpl(Container.java:2024)
        at java.awt.Component.dispatchEvent(Component.java:3803)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4212)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3892)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3822)
        at java.awt.Container.dispatchEventImpl(Container.java:2010)
        at java.awt.Window.dispatchEventImpl(Window.java:1774)
        at java.awt.Component.dispatchEvent(Component.java:3803)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
[catch] at
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
        at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)