quickload node too long

Tried to add local folder QL site but got this error:

Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: Node name file%3A%2FUsers%2Fpi%2FDropbox%2FTranscriptome%2520Assembly%2FigbFiles%2Fquickload%2F too long
at java.util.prefs.AbstractPreferences.node(AbstractPreferences.java:814)
at java.util.prefs.AbstractPreferences.node(AbstractPreferences.java:796)
at com.affymetrix.genometryImpl.general.GenericServer.<init>(GenericServer.java:44)
at com.affymetrix.igb.general.ServerList.addServer(ServerList.java:161)
at com.affymetrix.igb.general.ServerList.addServer(ServerList.java:182)
at com.affymetrix.igb.view.load.GeneralLoadUtils.addServer(GeneralLoadUtils.java:132)
at com.affymetrix.igb.view.ServerPrefsView.addDataSource(ServerPrefsView.java:214)
at com.affymetrix.igb.view.DataLoadPrefsView.addDataSource(DataLoadPrefsView.java:382)
at com.affymetrix.igb.view.ServerPrefsView.showAddSourceDialog(ServerPrefsView.java:199)
at com.affymetrix.igb.view.ServerPrefsView.access$000(ServerPrefsView.java:52)
at com.affymetrix.igb.view.ServerPrefsView$1.actionPerformed(ServerPrefsView.java:97)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2028)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2351)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at java.awt.Component.processMouseEvent(Component.java:6352)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
at java.awt.Component.processEvent(Component.java:6117)
at java.awt.Container.processEvent(Container.java:2085)
at java.awt.Component.dispatchEventImpl(Component.java:4714)
at java.awt.Container.dispatchEventImpl(Container.java:2143)
at java.awt.Component.dispatchEvent(Component.java:4544)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4621)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4282)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4212)
at java.awt.Container.dispatchEventImpl(Container.java:2129)
at java.awt.Window.dispatchEventImpl(Window.java:2478)
at java.awt.Component.dispatchEvent(Component.java:4544)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:635)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)