basic FC reading is working for different script version

src/gui_qt/io/fcbatchreader.py

@@ -54,6 +54,7 @@ class QFCReader(QtWidgets.QDialog, Ui_FCEval_dialog):
             infiles = QtWidgets.QFileDialog.getExistingDirectory(caption='Select input directory',
                                                                  directory=str(self.path),
                                                                  options=QtWidgets.QFileDialog.ShowDirsOnly)
+            infiles = [infiles] if infiles else infiles
 
         if infiles:
             self.listWidget.addItems(infiles)