handle cancel for changing Main Directory

sohstationviewer/view/main_window.py

@@ -282,8 +282,11 @@ class MainWindow(QtWidgets.QMainWindow, UIMainWindow):
         fd.setFileMode(QtWidgets.QFileDialog.Directory)
         fd.setDirectory(self.curr_dir_line_edit.text())
         fd.exec_()
-        new_path = fd.selectedFiles()[0]
-        self.set_current_directory(new_path)
+        try:
+            new_path = fd.selectedFiles()[0]
+            self.set_current_directory(new_path)
+        except IndexError:
+            pass
 
     def get_requested_wf_chans(self) -> List[Union[str, int]]:
         """