diff --git a/IPython/parallel/apps/ipclusterapp.py b/IPython/parallel/apps/ipclusterapp.py
index 89ead66..161696d 100755
--- a/IPython/parallel/apps/ipclusterapp.py
+++ b/IPython/parallel/apps/ipclusterapp.py
@@ -511,7 +511,7 @@ class IPBaseParallelApplication(Application):
 
 def launch_new_instance():
     """Create and run the IPython cluster."""
-    app = IPBaseParallelApplication()
+    app = IPBaseParallelApplication.instance()
     app.initialize()
     app.start()
 
diff --git a/IPython/parallel/apps/ipcontrollerapp.py b/IPython/parallel/apps/ipcontrollerapp.py
index 3e4d3a3..e2fa88b 100755
--- a/IPython/parallel/apps/ipcontrollerapp.py
+++ b/IPython/parallel/apps/ipcontrollerapp.py
@@ -389,7 +389,7 @@ class IPControllerApp(BaseParallelApplication):
 
 def launch_new_instance():
     """Create and run the IPython controller"""
-    app = IPControllerApp()
+    app = IPControllerApp.instance()
     app.initialize()
     app.start()
 
diff --git a/IPython/parallel/apps/ipengineapp.py b/IPython/parallel/apps/ipengineapp.py
index ad96a49..241cad5 100755
--- a/IPython/parallel/apps/ipengineapp.py
+++ b/IPython/parallel/apps/ipengineapp.py
@@ -260,7 +260,7 @@ class IPEngineApp(BaseParallelApplication):
 
 def launch_new_instance():
     """Create and run the IPython engine"""
-    app = IPEngineApp()
+    app = IPEngineApp.instance()
     app.initialize()
     app.start()
 
diff --git a/IPython/parallel/apps/iploggerapp.py b/IPython/parallel/apps/iploggerapp.py
index f0a60df..bbfc1f0 100755
--- a/IPython/parallel/apps/iploggerapp.py
+++ b/IPython/parallel/apps/iploggerapp.py
@@ -86,7 +86,7 @@ class IPLoggerApp(BaseParallelApplication):
 
 def launch_new_instance():
     """Create and run the IPython LogWatcher"""
-    app = IPLoggerApp()
+    app = IPLoggerApp.instance()
     app.initialize()
     app.start()