Impossible to set global SDK after upgrade to 13.1.2

Upgraded on Apr 24 from 13.1.1 to 13.1.2
IntelliJ comes up without Global SDK set (why?!) and any attempts to set it result in errors

- errors go in idea.log only, without any explanation in the IDE itself
- errors look like below, with various class names
- per suggestion of Serge Baranov I disabled all plug-ins except IDEAIvy, which I need for builds, but that did not help, although particular class that was "NotFound" has changed
- I downloaded a fresh JDK from Oracle, it's the same that is used by Windows 7 OS, Chrome and other software on this machine, I don't think the SDK itself is a problem
- Upgraded to lates 13.1.2 build on Apr 28 - no difference

Can one do anything withour a global SDK? the answer is NO

2014-04-28 18:56:36,181 [ 483317]  ERROR - llij.ide.plugins.PluginManager - Could not initialize class com.intellij.openapi.vfs.impl.jar.JarHandler$CacheLibraryInfo
java.lang.NoClassDefFoundError: Could not initialize class com.intellij.openapi.vfs.impl.jar.JarHandler$CacheLibraryInfo

 at com.intellij.openapi.vfs.impl.jar.JarHandler.getMirrorWithContentHash(JarHandler.java:117)

 at com.intellij.openapi.vfs.impl.jar.JarHandler.getMirrorFile(JarHandler.java:94)

 at com.intellij.openapi.vfs.impl.jar.JarHandlerBase.createJarFile(JarHandlerBase.java:102)

 at com.intellij.openapi.vfs.impl.jar.JarHandlerBase.getJar(JarHandlerBase.java:88)

 at com.intellij.openapi.vfs.impl.jar.JarHandlerBase.convertToEntry(JarHandlerBase.java:282)

 at com.intellij.openapi.vfs.impl.jar.JarHandlerBase.getAttributes(JarHandlerBase.java:348)

 at com.intellij.openapi.vfs.impl.jar.JarFileSystemImpl.getAttributes(JarFileSystemImpl.java:363)

 at com.intellij.openapi.vfs.newvfs.persistent.PersistentFSImpl.getId(PersistentFSImpl.java:392)

 at com.intellij.openapi.vfs.newvfs.impl.VirtualDirectoryImpl.doFindChild(VirtualDirectoryImpl.java:231)

 at com.intellij.openapi.vfs.newvfs.impl.VirtualDirectoryImpl.findChild(VirtualDirectoryImpl.java:108)

 at com.intellij.openapi.vfs.newvfs.impl.VirtualDirectoryImpl.findChild(VirtualDirectoryImpl.java:656)

 at com.intellij.openapi.vfs.newvfs.impl.VirtualDirectoryImpl.findChild(VirtualDirectoryImpl.java:61)

 at com.intellij.openapi.vfs.newvfs.VfsImplUtil.findFileByPath(VfsImplUtil.java:55)

 at com.intellij.openapi.vfs.impl.jar.JarFileSystemImpl.findFileByPath(JarFileSystemImpl.java:326)

 at com.intellij.openapi.vfs.impl.VirtualFileManagerImpl.findFileByUrl(VirtualFileManagerImpl.java:135)

 at com.intellij.openapi.projectRoots.impl.JavaSdkImpl.findInJar(JavaSdkImpl.java:543)

 at com.intellij.openapi.projectRoots.impl.JavaSdkImpl.findSources(JavaSdkImpl.java:517)

 at com.intellij.openapi.projectRoots.impl.JavaSdkImpl.findSources(JavaSdkImpl.java:504)

 at com.intellij.openapi.projectRoots.impl.JavaSdkImpl.setupSdkPaths(JavaSdkImpl.java:320)

 at com.intellij.openapi.projectRoots.SdkType.setupSdkPaths(SdkType.java:85)

 at com.intellij.openapi.roots.ui.configuration.projectRoot.ProjectSdksModel.setupSdk(ProjectSdksModel.java:284)

 at com.intellij.openapi.roots.ui.configuration.projectRoot.ProjectSdksModel.access$200(ProjectSdksModel.java:48)

 at com.intellij.openapi.roots.ui.configuration.projectRoot.ProjectSdksModel$5.consume(ProjectSdksModel.java:275)

 at com.intellij.openapi.roots.ui.configuration.projectRoot.ProjectSdksModel$5.consume(ProjectSdksModel.java:269)

 at com.intellij.openapi.projectRoots.impl.SdkConfigurationUtil$7.consume(SdkConfigurationUtil.java:303)

 at com.intellij.openapi.projectRoots.impl.SdkConfigurationUtil$7.consume(SdkConfigurationUtil.java:298)

 at com.intellij.openapi.fileChooser.ex.FileChooserDialogImpl.choose(FileChooserDialogImpl.java:133)

 at com.intellij.openapi.fileChooser.FileChooser.chooseFiles(FileChooser.java:111)

 at com.intellij.openapi.fileChooser.FileChooser.chooseFiles(FileChooser.java:89)

 at com.intellij.openapi.projectRoots.impl.SdkConfigurationUtil.selectSdkHome(SdkConfigurationUtil.java:298)

 at com.intellij.openapi.roots.ui.configuration.projectRoot.ProjectSdksModel.doAdd(ProjectSdksModel.java:269)

 at com.intellij.openapi.roots.ui.configuration.projectRoot.ProjectSdksModel$3.actionPerformed(ProjectSdksModel.java:251)

 at com.intellij.ui.popup.PopupFactoryImpl$ActionPopupStep$1.run(PopupFactoryImpl.java:733)

 at com.intellij.ui.popup.AbstractPopup$18.run(AbstractPopup.java:1248)

 at com.intellij.openapi.wm.impl.FocusManagerImpl.flushRequest(FocusManagerImpl.java:649)

 at com.intellij.openapi.wm.impl.FocusManagerImpl.flushNow(FocusManagerImpl.java:630)

 at com.intellij.openapi.wm.impl.FocusManagerImpl.flushIdleRequests(FocusManagerImpl.java:600)

 at com.intellij.openapi.wm.impl.FocusManagerImpl.access$200(FocusManagerImpl.java:60)

 at com.intellij.openapi.wm.impl.FocusManagerImpl$7.run(FocusManagerImpl.java:496)

 at com.intellij.util.ui.UIUtil.invokeLaterIfNeeded(UIUtil.java:2053)

 at com.intellij.openapi.wm.impl.FocusManagerImpl.doWhenFocusSettlesDown(FocusManagerImpl.java:474)

 at com.intellij.openapi.wm.impl.IdeFocusManagerImpl.doWhenFocusSettlesDown(IdeFocusManagerImpl.java:59)

 at com.intellij.ui.popup.AbstractPopup.dispose(AbstractPopup.java:1254)

 at com.intellij.ui.popup.WizardPopup.dispose(WizardPopup.java:153)

 at com.intellij.ui.popup.list.ListPopupImpl.dispose(ListPopupImpl.java:290)

 at com.intellij.ui.popup.WizardPopup.disposeAllParents(WizardPopup.java:256)

 at com.intellij.ui.popup.list.ListPopupImpl.handleNextStep(ListPopupImpl.java:407)

 at com.intellij.ui.popup.list.ListPopupImpl._handleSelect(ListPopupImpl.java:367)

 at com.intellij.ui.popup.list.ListPopupImpl.tryToAutoSelect(ListPopupImpl.java:129)

 at com.intellij.ui.popup.list.ListPopupImpl.beforeShow(ListPopupImpl.java:92)

 at com.intellij.ui.popup.AbstractPopup.show(AbstractPopup.java:673)

 at com.intellij.ui.popup.WizardPopup.show(WizardPopup.java:199)

 at com.intellij.ui.popup.AbstractPopup.show(AbstractPopup.java:432)

 at com.intellij.ui.popup.AbstractPopup.showUnderneathOf(AbstractPopup.java:426)

 at com.intellij.openapi.ui.MasterDetailsComponent$MyActionGroupWrapper.actionPerformed(MasterDetailsComponent.java:936)

 at com.intellij.openapi.actionSystem.ex.ActionUtil.performActionDumbAware(ActionUtil.java:164)

 at com.intellij.openapi.actionSystem.impl.ActionButton.actionPerformed(ActionButton.java:170)

 at com.intellij.openapi.actionSystem.impl.ActionButton.performAction(ActionButton.java:133)

 at com.intellij.openapi.actionSystem.impl.ActionButton.processMouseEvent(ActionButton.java:313)

 at java.awt.Component.processEvent(Component.java:6270)

 at java.awt.Container.processEvent(Container.java:2229)

 at java.awt.Component.dispatchEventImpl(Component.java:4861)

 at java.awt.Container.dispatchEventImpl(Container.java:2287)

 at java.awt.Component.dispatchEvent(Component.java:4687)

 at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)

 at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)

 at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)

 at java.awt.Container.dispatchEventImpl(Container.java:2273)

 at java.awt.Window.dispatchEventImpl(Window.java:2719)

 at java.awt.Component.dispatchEvent(Component.java:4687)

 at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735)

 at java.awt.EventQueue.access$200(EventQueue.java:103)

 at java.awt.EventQueue$3.run(EventQueue.java:694)

 at java.awt.EventQueue$3.run(EventQueue.java:692)

 at java.security.AccessController.doPrivileged(Native Method)

 at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)

 at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)

 at java.awt.EventQueue$4.run(EventQueue.java:708)

 at java.awt.EventQueue$4.run(EventQueue.java:706)

 at java.security.AccessController.doPrivileged(Native Method)

 at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)

 at java.awt.EventQueue.dispatchEvent(EventQueue.java:705)