diff --git a/core/app.py b/core/app.py
index da0618e7..5f2a8f94 100644
--- a/core/app.py
+++ b/core/app.py
@@ -167,6 +167,8 @@ class DupeGuru(Broadcaster):
         if not op.exists(self.appdata):
             os.makedirs(self.appdata)
         self.discarded_file_count = 0
+        self.fileclasses = [fs.File]
+        self.folderclass = fs.Folder
         self.directories = directories.Directories()
         self.results = results.Results(self)
         self.ignore_list = IgnoreList()
@@ -257,7 +259,7 @@ class DupeGuru(Broadcaster):
 
     def _create_file(self, path):
         # We add fs.Folder to fileclasses in case the file we're loading contains folder paths.
-        return fs.get_file(path, self.directories.fileclasses + [fs.Folder])
+        return fs.get_file(path, self.fileclasses + [fs.Folder])
 
     def _get_file(self, str_path):
         path = Path(str_path)
@@ -749,9 +751,9 @@ class DupeGuru(Broadcaster):
         def do(j):
             j.set_progress(0, tr("Collecting files to scan"))
             if scanner.scan_type == ScanType.Folders:
-                files = list(self.directories.get_folders(j))
+                files = list(self.directories.get_folders(folderclass=self.folderclass, j=j))
             else:
-                files = list(self.directories.get_files(j))
+                files = list(self.directories.get_files(fileclasses=self.fileclasses, j=j))
             if self.options['ignore_hardlink_matches']:
                 files = self._remove_hardlink_dupes(files)
             logging.info('Scanning %d files' % len(files))
diff --git a/core/directories.py b/core/directories.py
index c1e624de..4a1415dd 100644
--- a/core/directories.py
+++ b/core/directories.py
@@ -49,12 +49,10 @@ class Directories:
     in :mod:`core.fs`) that have to be scanned according to the chosen folders/states.
     """
     #---Override
-    def __init__(self, fileclasses=[fs.File]):
+    def __init__(self):
         self._dirs = []
         # {path: state}
         self.states = {}
-        self.fileclasses = fileclasses
-        self.folderclass = fs.Folder
 
     def __contains__(self, path):
         for p in self._dirs:
@@ -77,7 +75,7 @@ class Directories:
         if path.name.startswith('.'): # hidden
             return DirectoryState.Excluded
 
-    def _get_files(self, from_path, j):
+    def _get_files(self, from_path, fileclasses, j):
         j.check_if_cancelled()
         state = self.get_state(from_path)
         if state == DirectoryState.Excluded:
@@ -89,7 +87,7 @@ class Directories:
         try:
             filepaths = set()
             if state != DirectoryState.Excluded:
-                found_files = fs.get_files(from_path, fileclasses=self.fileclasses)
+                found_files = fs.get_files(from_path, fileclasses=fileclasses)
                 logging.debug("Collected %d files in folder %s", len(found_files), str(from_path))
                 for file in found_files:
                     file.is_ref = state == DirectoryState.Reference
@@ -99,7 +97,7 @@ class Directories:
             # want to recurse into it
             subfolders = [p for p in from_path.listdir() if not p.islink() and p.isdir() and p not in filepaths]
             for subfolder in subfolders:
-                for file in self._get_files(subfolder, j):
+                for file in self._get_files(subfolder, fileclasses=fileclasses, j=j):
                     yield file
         except (EnvironmentError, fs.InvalidPath):
             pass
@@ -150,22 +148,26 @@ class Directories:
         except EnvironmentError:
             return []
 
-    def get_files(self, j=job.nulljob):
+    def get_files(self, fileclasses=None, j=job.nulljob):
         """Returns a list of all files that are not excluded.
 
         Returned files also have their ``is_ref`` attr set if applicable.
         """
+        if fileclasses is None:
+            fileclasses = [fs.File]
         for path in self._dirs:
-            for file in self._get_files(path, j):
+            for file in self._get_files(path, fileclasses=fileclasses, j=j):
                 yield file
 
-    def get_folders(self, j=job.nulljob):
+    def get_folders(self, folderclass=None, j=job.nulljob):
         """Returns a list of all folders that are not excluded.
 
         Returned folders also have their ``is_ref`` attr set if applicable.
         """
+        if folderclass is None:
+            folderclass = fs.Folder
         for path in self._dirs:
-            from_folder = self.folderclass(path)
+            from_folder = folderclass(path)
             for folder in self._get_folders(from_folder, j):
                 yield folder
 
diff --git a/core_me/app.py b/core_me/app.py
index 4ae78f04..09128ea6 100644
--- a/core_me/app.py
+++ b/core_me/app.py
@@ -21,7 +21,7 @@ class DupeGuru(DupeGuruBase):
     def __init__(self, view):
         DupeGuruBase.__init__(self, view)
         self.scanner = scanner.ScannerME()
-        self.directories.fileclasses = [fs.MusicFile]
+        self.fileclasses = [fs.MusicFile]
 
     def _get_dupe_sort_key(self, dupe, get_group, key, delta):
         if key == 'folder_path':
diff --git a/core_se/app.py b/core_se/app.py
index e90cad60..a764bb52 100644
--- a/core_se/app.py
+++ b/core_se/app.py
@@ -16,8 +16,8 @@ class DupeGuru(DupeGuruBase):
 
     def __init__(self, view):
         DupeGuruBase.__init__(self, view)
-        self.directories.fileclasses = [fs.File]
-        self.directories.folderclass = fs.Folder
+        self.fileclasses = [fs.File]
+        self.folderclass = fs.Folder
 
     def _prioritization_categories(self):
         return prioritize.all_categories()
diff --git a/qt/pe/app.py b/qt/pe/app.py
index 2f02f8f7..cb733c1d 100644
--- a/qt/pe/app.py
+++ b/qt/pe/app.py
@@ -76,7 +76,7 @@ class DupeGuru(DupeGuruBase):
     PREFERENCES_DIALOG_CLASS = PreferencesDialog
 
     def _setup(self):
-        self.model.directories.fileclasses = [File]
+        self.model.fileclasses = [File]
         DupeGuruBase._setup(self)
         self.directories_dialog.menuFile.insertAction(
             self.directories_dialog.actionLoadResults, self.resultWindow.actionClearPictureCache