Sites like Newegg or AliExpress often provide download links in the product description.
“Mine opens and shows the mouse but only after I close it and reopen it. Once the software is open, I still can't change any of the settings except for the DPI for some reason.” Reddit · r/MouseReview · 1 month ago deiog g11 mouse software new
If the G11 model you own features RGB lighting, the software controls the "Light" tab. Sites like Newegg or AliExpress often provide download