diff --git a/openlp/core/common/applocation.py b/openlp/core/common/applocation.py
index 79d857cd1..394f5e2ba 100644
--- a/openlp/core/common/applocation.py
+++ b/openlp/core/common/applocation.py
@@ -61,13 +61,14 @@ class AppLocation(object):
         :rtype: Path
         """
         if dir_type == AppLocation.AppDir or dir_type == AppLocation.VersionDir:
-            return get_frozen_path(FROZEN_APP_PATH, APP_PATH)
+            path = get_frozen_path(FROZEN_APP_PATH, APP_PATH)
         elif dir_type == AppLocation.PluginsDir:
-            return get_frozen_path(FROZEN_APP_PATH, APP_PATH) / 'plugins'
+            path = get_frozen_path(FROZEN_APP_PATH, APP_PATH) / 'plugins'
         elif dir_type == AppLocation.LanguageDir:
-            return get_frozen_path(FROZEN_APP_PATH, _get_os_dir_path(dir_type)) / 'i18n'
+            path = get_frozen_path(FROZEN_APP_PATH, _get_os_dir_path(dir_type)) / 'i18n'
         else:
-            return _get_os_dir_path(dir_type)
+            path = _get_os_dir_path(dir_type)
+        return path.resolve()
 
     @staticmethod
     def get_data_path():
@@ -83,7 +84,7 @@ class AppLocation(object):
         else:
             path = AppLocation.get_directory(AppLocation.DataDir)
             create_paths(path)
-        return path
+        return path.resolve()
 
     @staticmethod
     def get_files(section=None, extension=''):
diff --git a/openlp/core/ui/mainwindow.py b/openlp/core/ui/mainwindow.py
index cedd6c836..e9cb92476 100644
--- a/openlp/core/ui/mainwindow.py
+++ b/openlp/core/ui/mainwindow.py
@@ -554,7 +554,7 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow, LogMixin, RegistryPropert
         wait_dialog.setAutoClose(False)
         wait_dialog.setCancelButton(None)
         wait_dialog.show()
-        thread_names = self.application.worker_threads.keys()
+        thread_names = list(self.application.worker_threads.keys())
         for thread_name in thread_names:
             if thread_name not in self.application.worker_threads.keys():
                 continue
diff --git a/tests/functional/openlp_core/common/test_applocation.py b/tests/functional/openlp_core/common/test_applocation.py
index 33bd0601e..cdbdd3143 100644
--- a/tests/functional/openlp_core/common/test_applocation.py
+++ b/tests/functional/openlp_core/common/test_applocation.py
@@ -30,6 +30,7 @@ from openlp.core.common.applocation import AppLocation
 
 
 FILE_LIST = ['file1', 'file2', 'file3.txt', 'file4.txt', 'file5.mp3', 'file6.mp3']
+BASE_DIR = (AppLocation.get_directory(AppLocation.AppDir) / '..').resolve()
 
 
 @patch('openlp.core.common.applocation.Settings')
@@ -42,9 +43,9 @@ def test_get_data_path(mocked_os, mocked_create_paths, mocked_get_directory, Moc
     """
     # GIVEN: A mocked out Settings class and a mocked out AppLocation.get_directory()
     MockSettings.return_value.contains.return_value = False
-    mocked_get_directory.return_value = os.path.join('tests', 'dir')
+    mocked_get_directory.return_value = Path('tests', 'dir')
     mocked_create_paths.return_value = True
-    mocked_os.path.normpath.return_value = os.path.join('tests', 'dir')
+    mocked_os.path.normpath.return_value = Path('tests', 'dir')
 
     # WHEN: we call AppLocation.get_data_path()
     data_path = AppLocation.get_data_path()
@@ -52,8 +53,8 @@ def test_get_data_path(mocked_os, mocked_create_paths, mocked_get_directory, Moc
     # THEN: check that all the correct methods were called, and the result is correct
     MockSettings.return_value.contains.assert_called_with('advanced/data path')
     mocked_get_directory.assert_called_with(AppLocation.DataDir)
-    mocked_create_paths.assert_called_with(os.path.join('tests', 'dir'))
-    assert data_path == os.path.join('tests', 'dir'), 'Result should be "tests/dir"'
+    mocked_create_paths.assert_called_with(Path('tests', 'dir'))
+    assert data_path == Path(BASE_DIR, 'tests', 'dir'), 'Result should be "tests/dir"'
 
 
 @patch('openlp.core.common.applocation.Settings')
@@ -71,7 +72,7 @@ def test_get_data_path_with_custom_location(MockSettings):
     # THEN: the mocked Settings methods were called and the value returned was our set up value
     MockSettings.return_value.contains.assert_called_with('advanced/data path')
     MockSettings.return_value.value.assert_called_with('advanced/data path')
-    assert data_path == Path('custom', 'dir'), 'Result should be "custom/dir"'
+    assert data_path == Path(BASE_DIR, 'custom', 'dir'), 'Result should be "custom/dir"'
 
 
 @patch('openlp.core.common.applocation.Path.glob')
@@ -140,7 +141,7 @@ def test_get_directory_for_app_dir(mocked_get_frozen_path):
     directory = AppLocation.get_directory(AppLocation.AppDir)
 
     # THEN: check that the correct directory is returned
-    assert directory == Path('app', 'dir'), 'Directory should be "app/dir"'
+    assert directory == Path(BASE_DIR, 'app', 'dir'), 'Directory should be "app/dir"'
 
 
 @patch('openlp.core.common.applocation.get_frozen_path')
@@ -162,7 +163,7 @@ def test_get_directory_for_plugins_dir(mocked_sys, mocked_split, mocked_abspath,
     directory = AppLocation.get_directory(AppLocation.PluginsDir)
 
     # THEN: The correct directory should be returned
-    assert directory == Path('dir', 'plugins'), 'Directory should be "dir/plugins"'
+    assert directory == Path(BASE_DIR, 'dir', 'plugins'), 'Directory should be "dir/plugins"'
 
 
 @patch('openlp.core.common.sys')