diff --git a/openlp/core/ui/servicemanager.py b/openlp/core/ui/servicemanager.py
index 6d721823a..85dff6b91 100644
--- a/openlp/core/ui/servicemanager.py
+++ b/openlp/core/ui/servicemanager.py
@@ -759,7 +759,7 @@ class ServiceManager(QtGui.QWidget):
                     self.onNewService()
                     for item in items:
                         serviceitem = ServiceItem()
-                        serviceitem.render_manager = self.parent.RenderManager
+                        serviceitem.render_manager = self.parent.renderManager
                         serviceitem.set_from_service(item, self.servicePath)
                         self.validateItem(serviceitem)
                         self.addServiceItem(serviceitem)
@@ -820,7 +820,7 @@ class ServiceManager(QtGui.QWidget):
         """
         log.debug(u'onThemeComboBoxSelected')
         self.service_theme = unicode(self.themeComboBox.currentText())
-        self.parent.RenderManager.set_service_theme(self.service_theme)
+        self.parent.renderManager.set_service_theme(self.service_theme)
         QtCore.QSettings().setValue(
             self.parent.serviceSettingsSection + u'/service theme',
             QtCore.QVariant(self.service_theme))
@@ -832,7 +832,7 @@ class ServiceManager(QtGui.QWidget):
         sure the theme combo box is in the correct state.
         """
         log.debug(u'themeChange')
-        if self.parent.RenderManager.theme_level == ThemeLevel.Global:
+        if self.parent.renderManager.theme_level == ThemeLevel.Global:
             self.toolbar.actions[u'ThemeLabel'].setVisible(False)
             self.toolbar.actions[u'ThemeWidget'].setVisible(False)
         else:
@@ -846,7 +846,7 @@ class ServiceManager(QtGui.QWidget):
         """
         log.debug(u'regenerateServiceItems')
         # force reset of renderer as theme data has changed
-        self.parent.RenderManager.themedata = None
+        self.parent.renderManager.themedata = None
         if self.serviceItems:
             tempServiceItems = self.serviceItems
             self.serviceManagerList.clear()
@@ -1088,7 +1088,7 @@ class ServiceManager(QtGui.QWidget):
             index = 0
             self.service_theme = u''
         self.themeComboBox.setCurrentIndex(index)
-        self.parent.RenderManager.set_service_theme(self.service_theme)
+        self.parent.renderManager.set_service_theme(self.service_theme)
         self.regenerateServiceItems()
 
     def onThemeChangeAction(self):
diff --git a/openlp/core/ui/slidecontroller.py b/openlp/core/ui/slidecontroller.py
index 48810990a..f667c6d3c 100644
--- a/openlp/core/ui/slidecontroller.py
+++ b/openlp/core/ui/slidecontroller.py
@@ -400,7 +400,7 @@ class SlideController(QtGui.QWidget):
         log.debug(u'screenSizeChanged live = %s' % self.isLive)
         # rebuild display as screen size changed
         self.display = MainDisplay(self, self.screens, self.isLive)
-        self.display.imageManager = self.parent.RenderManager.image_manager
+        self.display.imageManager = self.parent.renderManager.image_manager
         self.display.alertTab = self.alertTab
         self.ratio = float(self.screens.current[u'size'].width()) / \
             float(self.screens.current[u'size'].height())
@@ -416,7 +416,7 @@ class SlideController(QtGui.QWidget):
         """
         log.debug(u'widthChanged live = %s' % self.isLive)
         width = self.parent.ControlSplitter.sizes()[self.split]
-        height = width * self.parent.RenderManager.screen_ratio
+        height = width * self.parent.renderManager.screen_ratio
         self.PreviewListWidget.setColumnWidth(0, width)
         # Sort out image heights (Songs, bibles excluded)
         if self.serviceItem and not self.serviceItem.is_text():
@@ -595,14 +595,14 @@ class SlideController(QtGui.QWidget):
                 label.setScaledContents(True)
                 if self.serviceItem.is_command():
                     image = resize_image(frame[u'image'],
-                        self.parent.RenderManager.width,
-                        self.parent.RenderManager.height)
+                        self.parent.renderManager.width,
+                        self.parent.renderManager.height)
                 else:
-                    image = self.parent.RenderManager.image_manager. \
+                    image = self.parent.renderManager.image_manager. \
                             get_image(frame[u'title'])
                 label.setPixmap(QtGui.QPixmap.fromImage(image))
                 self.PreviewListWidget.setCellWidget(framenumber, 0, label)
-                slideHeight = width * self.parent.RenderManager.screen_ratio
+                slideHeight = width * self.parent.renderManager.screen_ratio
                 row += 1
             text.append(unicode(row))
             self.PreviewListWidget.setItem(framenumber, 0, item)
diff --git a/openlp/core/ui/thememanager.py b/openlp/core/ui/thememanager.py
index 56765eda6..e69bdade1 100644
--- a/openlp/core/ui/thememanager.py
+++ b/openlp/core/ui/thememanager.py
@@ -750,7 +750,7 @@ class ThemeManager(QtGui.QWidget):
             Flag to tell message lines per page need to be generated.
         """
         log.debug(u'generateImage \n%s ', themeData)
-        return self.parent.RenderManager.generate_preview(themeData, forcePage)
+        return self.parent.renderManager.generate_preview(themeData, forcePage)
 
     def getPreviewImage(self, theme):
         """
diff --git a/openlp/core/ui/themestab.py b/openlp/core/ui/themestab.py
index 853865bb5..412d2dec2 100644
--- a/openlp/core/ui/themestab.py
+++ b/openlp/core/ui/themestab.py
@@ -153,7 +153,7 @@ class ThemesTab(SettingsTab):
         settings.setValue(u'global theme',
             QtCore.QVariant(self.global_theme))
         settings.endGroup()
-        self.parent.RenderManager.set_global_theme(
+        self.parent.renderManager.set_global_theme(
             self.global_theme, self.theme_level)
         Receiver.send_message(u'theme_update_global', self.global_theme)
 
@@ -171,7 +171,7 @@ class ThemesTab(SettingsTab):
 
     def onDefaultComboBoxChanged(self, value):
         self.global_theme = unicode(self.DefaultComboBox.currentText())
-        self.parent.RenderManager.set_global_theme(
+        self.parent.renderManager.set_global_theme(
             self.global_theme, self.theme_level)
         image = self.parent.ThemeManagerContents.getPreviewImage(
             self.global_theme)
@@ -198,7 +198,7 @@ class ThemesTab(SettingsTab):
             id = 0 # Not Found
             self.global_theme = u''
         self.DefaultComboBox.setCurrentIndex(id)
-        self.parent.RenderManager.set_global_theme(
+        self.parent.renderManager.set_global_theme(
             self.global_theme, self.theme_level)
         if self.global_theme is not u'':
             image = self.parent.ThemeManagerContents.getPreviewImage(