To factory reset your Apex Pro Gen 3, would you kindly do the following steps:
1. Hold the media button (located under the scroll wheel) until you are the OLED menu.
2. Scroll down to "About" and press the scroll wheel down to select it.
3. Then scroll down to "Factory Reset". Press the scroll wheel to select it.
4. Select "Yes" and let your keyboard complete the process.
Hope that helps!
GLHF