Fixed wrong filter for file browser

toolbox/__init__.py

@@ -101,6 +101,8 @@ class Toolbox:
             # Select the next utterance
             if self.ui.auto_next_checkbox.isChecked():
                 self.ui.browser_select_next()
+        elif fpath == "":
+            return 
         else:
             name = fpath.name
             speaker_name = fpath.parent.name

toolbox/ui.py

@@ -186,9 +186,9 @@ class UI(QDialog):
         fpath = QFileDialog().getOpenFileName(
             parent=self,
             caption="Select an audio file",
-            filter="*.mp3;*.flac;*.wav;*.m4a"
+            filter="Audio Files (*.mp3 *.flac *.wav *.m4a)"
         )
-        return Path(fpath[0]) if fpath[0] != "" else None
+        return Path(fpath[0]) if fpath[0] != "" else ""
     
     @staticmethod
     def repopulate_box(box, items, random=False):