I just noticed there is an error when you start the New Server dialog, select cdk 3.2+ and on the next page you first try to Browse for the minishift binary and then you change your mind and cancel that window.
Unhandled event loop exception java.lang.NullPointerException at java.io.File.<init>(File.java:277) at org.jboss.tools.openshift.cdk.server.ui.internal.CDK3ServerWizardFragment.kickValidationJob(CDK3ServerWizardFragment.java:218) at org.jboss.tools.openshift.cdk.server.ui.internal.CDK3ServerWizardFragment.access$3(CDK3ServerWizardFragment.java:214) at org.jboss.tools.openshift.cdk.server.ui.internal.CDK3ServerWizardFragment$3.widgetSelected(CDK3ServerWizardFragment.java:197) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:249) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:86) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4258) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1502) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1525) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1510) at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1314) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4082) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3699) at org.eclipse.jface.window.Window.runEventLoop(Window.java:818) at org.eclipse.jface.window.Window.open(Window.java:794) at org.eclipse.wst.server.ui.internal.actions.LaunchWizardAction.run(LaunchWizardAction.java:58) at org.eclipse.jface.action.Action.runWithEvent(Action.java:473) at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:565) at org.eclipse.jface.action.ActionContributionItem.lambda$4(ActionContributionItem.java:397) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:86) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4258) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1502) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1525) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1510) at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1314) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4082) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3699) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1150) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1039) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:153) at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:680) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:594) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:151) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:653) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:590) at org.eclipse.equinox.launcher.Main.run(Main.java:1499)