Makcu Setup
Here is how to setup your Makcu.
1) Before connecting any cables, take off the top cover of your Makcu (the side with the logo). It comes off easily and the buttons are underneath; you cannot flash it with the cover on. Ensure it is oriented in the same direction as shown in the picture below.

2) Next, navigate to the 'Downloads' section and install both the AIO Tool and the Makcu firmware.
3) After downloading, extract the files and review the terms below. Connect one end of the USB-A to USB-A cable to your second PC; the other end will be used to flash the Makcu.

4) Start by holding down Button 1 and plugging one usb into USB 1

5) Once the device is connected and in flash mode, you can proceed to flash the left side.

6) A file selection window will open. Navigate to the folder where you extracted the Makcu firmware and select the latest left side firmware to flash.
7) After you've flashed left side unplug the usb. Hit Button 2 and plug usb into USB 3.

8) Once the device is connected and in flash mode, you can proceed to flash the right side.

9) A file selection window will open. Navigate to the folder where you extracted the Makcu firmware and select the latest right side firmware to flash.
10) After the flashes are complete, unplug the cable from the rightmost USB port and reconnect it to the middle port on your Makcu (USB 2). Connect another USB-A to USB-A cable from your main PC to USB 1. Finally, connect USB 3 to your mouse. Once all cables are set up and you have confirmed that your Makcu functions correctly in cheats, you can replace the cover.