There are two common tools referred to as "MTool" or "MTools Lite." Based on your request for "1.27 download," it is likely you are looking for the Mileage Correction Software

Ensure you have the necessary runtime environments. If the tool stops responding during a large game load, it is recommended to keep the window in the foreground and wait for the "Data loading status" to complete. AI responses may include mistakes. Learn more

Launch mtool and look at the top-left corner. It should read v1.2.7 or build 127 . The "new upd" popup will appear only once.