AndroidStudio升级4.1后启动失败Plugin问题解决

AS升级4.1 后启动失败 Plugin问题 start fail 弹窗如下: Internal error. Please refer to https://code.google.com/p/android/issues java.lang.NoSuchMethodError: com.intellij.ide.plugins.PluginManagerCore.loadDescriptors()[Lcom/intellij/ide/plugins/IdeaPluginDescriptorImpl; at com.a.a.b.b.ar.a(ar.java:121) at com.a.a.