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The 64-bit multi-language version of the G402's software weighs in at 60.6MB, which isn't overly large for such a utility.
The first menu lets you switch between the G402's on-board memory for saving profiles or the host computer. Saving to the mouse has a few advantages, namely that these profiles won't be lost in the event of a format or if you take your mouse to game on a different system.
As we mentioned earlier, there are eight programmable buttons on the G402 and the software utility makes it easy to customize them by showing in a diagram exactly where each button is. Once the button has been selected, in our case the scroll wheel, you can edit what it does. The same menu also lets you adjust the DPI and program the on-the-fly DPI buttons.
The G402 has an improved lighting menu that lets you not only adjust the brightness but also the rate at which the light pulses, with the ability to disable the pulsing all together. The DPI light indicators can also be left on at all times while the option to disable the lights after a certain amount of inactivity is also possible.
The above menu doesn't really provide any real purpose other than showing you how fast you move your mouse. The ability to enable and disable the Fusion Engine for testing exists and the read out can be displayed in M/S or IPS. Frankly, I couldn't get much over 100 DPI so maybe the G402 is wasted on me?
Updating the G402 firmware is made easy using the above menu, while it is also simple to update the Logitech gaming software.