diff --git a/openlp/core/common/settings.py b/openlp/core/common/settings.py
index 297e1d37f..f974d949b 100644
--- a/openlp/core/common/settings.py
+++ b/openlp/core/common/settings.py
@@ -130,9 +130,6 @@ class Settings(QtCore.QSettings):
         ``advanced/slide limits`` to ``SlideLimits.Wrap``. **NOTE**, this means that the rules have to cover all cases!
         So, if the type of the old value is bool, then there must be two rules.
     """
-    on_monitor_default = True
-    if log.isEnabledFor(logging.DEBUG):
-        on_monitor_default = False
     __default_settings__ = {
         'settings/version': 0,
         'advanced/add page break': False,
@@ -205,7 +202,7 @@ class Settings(QtCore.QSettings):
         'core/view mode': 'default',
         # The other display settings (display position and dimensions) are defined in the ScreenList class due to a
         # circular dependency.
-        'core/display on monitor': on_monitor_default,
+        'core/display on monitor': False,
         'core/override position': False,
         'core/monitor': {},
         'core/application version': '0.0',
diff --git a/openlp/core/ui/media/vlcplayer.py b/openlp/core/ui/media/vlcplayer.py
index 244916d24..055d599aa 100644
--- a/openlp/core/ui/media/vlcplayer.py
+++ b/openlp/core/ui/media/vlcplayer.py
@@ -65,7 +65,7 @@ def get_vlc():
     if 'vlc' not in sys.modules:
         try:
             import vlc  # noqa module is not used directly, but is used via sys.modules['vlc']
-        except ImportError:
+        except (ImportError, OSError):
             return None
     # Verify that VLC is also loadable
     is_vlc_available = False
diff --git a/openlp/core/ui/thememanager.py b/openlp/core/ui/thememanager.py
index 46d067970..4a3aa5073 100644
--- a/openlp/core/ui/thememanager.py
+++ b/openlp/core/ui/thememanager.py
@@ -173,7 +173,7 @@ class ThemeManager(QtWidgets.QWidget, RegistryBase, Ui_ThemeManager, LogMixin, R
         for xml_file_path in xml_file_paths:
             theme_data = get_text_file_string(xml_file_path)
             theme = self._create_theme_from_xml(theme_data, self.theme_path)
-            self._write_theme(theme)
+            self.save_theme(theme)
             xml_file_path.unlink()
 
     def build_theme_path(self):
diff --git a/openlp/plugins/songs/songsplugin.py b/openlp/plugins/songs/songsplugin.py
index a6fdcd99f..f9a1fd2f8 100644
--- a/openlp/plugins/songs/songsplugin.py
+++ b/openlp/plugins/songs/songsplugin.py
@@ -66,8 +66,8 @@ __default_settings__ = {
     'songs/add song from service': True,
     'songs/add songbook slide': False,
     'songs/display songbar': True,
-    'songs/last directory import': '',
-    'songs/last directory export': '',
+    'songs/last directory import': None,
+    'songs/last directory export': None,
     'songs/songselect username': '',
     'songs/songselect password': '',
     'songs/songselect searches': '',
diff --git a/scripts/appveyor.yml b/scripts/appveyor.yml
index 76e305b4e..3e0e0ce3a 100644
--- a/scripts/appveyor.yml
+++ b/scripts/appveyor.yml
@@ -18,7 +18,7 @@ environment:
 
 install:
   # Install dependencies from pypi
-  - "%PYTHON%\\python.exe -m pip install sqlalchemy alembic appdirs chardet beautifulsoup4 lxml Mako mysql-connector-python pytest mock pyodbc psycopg2 pypiwin32 websockets asyncio waitress six webob requests QtAwesome PyQt5 PyQtWebEngine pymediainfo PyMuPDF QDarkStyle python-vlc"
+  - "%PYTHON%\\python.exe -m pip install sqlalchemy alembic appdirs chardet beautifulsoup4 lxml Mako mysql-connector-python pytest mock pyodbc psycopg2 pypiwin32 websockets asyncio waitress six webob requests QtAwesome PyQt5 PyQtWebEngine pymediainfo PyMuPDF QDarkStyle python-vlc Pyro4"
 
 build: off
 
diff --git a/tests/openlp_core/ui/test_themeform.py b/tests/openlp_core/ui/test_themeform.py
index 02a7d0589..19a86457f 100644
--- a/tests/openlp_core/ui/test_themeform.py
+++ b/tests/openlp_core/ui/test_themeform.py
@@ -23,7 +23,7 @@
 Interface tests to test the ThemeWizard class and related methods.
 """
 from unittest import TestCase
-from unittest.mock import patch
+from unittest.mock import patch, MagicMock
 
 from openlp.core.common.registry import Registry
 from openlp.core.ui.themeform import ThemeForm
@@ -39,6 +39,8 @@ class TestThemeManager(TestCase, TestMixin):
         Create the UI
         """
         Registry.create()
+        mocked_renderer = MagicMock()
+        Registry().register('renderer', mocked_renderer)
 
     @patch('openlp.core.display.window.QtWidgets.QVBoxLayout')
     def test_create_theme_wizard(self, mocked_qvboxlayout):