1. Run Join (Merge, Combine) Multiple VOB Files Into One Software.
2. Click the "Add VOB File(s)" button to add files. Then an open file dialog will appear, hold CTRL or SHIFT key to select multiple files. To add all files in a folder, click "Add All VOB Files in Folder" then select a folder.
3. To start joining the selected files/documents, click the "Join To One VOB" button.