diff --git a/forms/mainwindow.py b/forms/mainwindow.py
--- a/forms/mainwindow.py
+++ b/forms/mainwindow.py
@@ -71,10 +71,11 @@ class MainWindow(Ui_MainWindow, QtWidget
         os.makedirs(self.root, exist_ok=True)
 
         self.devices_model = CustomListModel()
+        self.table_model = CustomTableModel('(Not set)')
+
         self.devices_combobox.setModel(self.devices_model)
         self.refresh_disk_drives()
 
-        self.table_model = CustomTableModel('(Not set)')
         self.tableView.setModel(self.table_model)
         self.refresh_image_list()