Flash Tool Instructional Video (applies to both APEX and XIM4):
https://youtu.be/fYlwNXl-ZGwFlash Upgrade Instructions:
1. Hold down the button on your XIM
2. Plug your XIM into your computer while continuing to hold the button
3. Wait for your XIM's light to display blue and then release the button
4. Download and run the XIM Flash tool
5. Select Factory Reset
6. Disconnect your XIM from your computer after the tool completes