Exception while opening NetBeans

[Chris2011]

When I open NetBeans, I found this exception in the messages.log

INFO [org.netbeans.core.windows.persistence]: [PersistenceManager.getTopComponentForID] Problem when deserializing TopComponent for tcID:'MapReduceTopComponent'. Reason: null
Content: 
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE settings PUBLIC "-//NetBeans//DTD Session settings 1.0//EN" "http://www.netbeans.org/dtds/sessionsettings-1_0.dtd">
<settings version="1.0">
  <instance class="org.netbeans.modules.mongodb.ui.windows.MapReduceTopComponent"/>
</settings>
Class: class org.netbeans.modules.mongodb.ui.windows.MapReduceTopComponent
Source: MultiFileObject@7bba9dd6[Windows2Local/Components/MapReduceTopComponent.settings]
Content: 
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE settings PUBLIC "-//NetBeans//DTD Session settings 1.0//EN" "http://www.netbeans.org/dtds/sessionsettings-1_0.dtd">
<settings version="1.0">
  <instance class="org.netbeans.modules.mongodb.ui.windows.MapReduceTopComponent"/>
</settings>
Class: class org.netbeans.modules.mongodb.ui.windows.MapReduceTopComponent
Source: MultiFileObject@7bba9dd6[Windows2Local/Components/MapReduceTopComponent.settings]
Caused: java.lang.NoSuchMethodException: org.netbeans.modules.mongodb.ui.windows.MapReduceTopComponent.<init>()
	at java.lang.Class.getConstructor0(Class.java:3082)
	at java.lang.Class.getDeclaredConstructor(Class.java:2178)
	at org.netbeans.modules.settings.convertors.XMLSettingsSupport.newInstance(XMLSettingsSupport.java:98)
	at org.netbeans.modules.settings.convertors.XMLSettingsSupport$SettingsRecognizer.instanceCreate(XMLSettingsSupport.java:628)

I found it twice, please have a look and it would be great to fix it.