If your eS mouse has stopped working wirelessly after a firmware update, there are a few steps you can take to resolve the issue. First, connect the mouse using the cable to see if it works in wired mode. If it does, you can proceed with the following steps to restore wireless functionality.

1. Turn off the mouse, Disconnect the mouse from the cable

2. Unplug the dongle and plug it back in using the cable.

3. Update the dongle firmware.

If you encounter any issues or need further assistance, please don't hesitate to contact our customer support team. We are here to help and will do our best to ensure that your eS mouse is working as it should.