为提高效率，提问时请提供以下信息，问题描述清晰可优先响应。
【DM版本】:dm8
【操作系统】：windows
【CPU】:intel
【问题描述】*：管理工具打开闪退
!ENTRY org.eclipse.ui 4 0 2026-04-10 11:11:16.481
!MESSAGE Unhandled event loop exception
!STACK 0
java.lang.NullPointerException
at com.dameng.tool.WorkbenchManager.getActiveShell(WorkbenchManager.java:95)
at com.dameng.tool.WorkbenchManager.showPerspective(WorkbenchManager.java:115)
at com.dameng.tool.WorkbenchManager.showPerspective(WorkbenchManager.java:135)
at com.dameng.tool.advisor.BaseWorkbenchAdvisor.postStartup(BaseWorkbenchAdvisor.java:74)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2575)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438)
at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:664)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at com.dameng.manager.ManagerApplication.start(ManagerApplication.java:73)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:369)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
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:620)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:575)
at org.eclipse.equinox.launcher.Main.run(Main.java:1408)