Windows sucks. I had not one, or two, or even three … but five devices installed! Seriously, I didn't do it! And my mouse settings would change every time I rebooted. I wonder why? [04.22.2017: I disabled 4 of 'em starting from the bottom of the list. My mouse died on number 4, so I re-enabled it, and disabled number 1. Let ya know if this helped!]

File Location: C:\Users\USERNAME\AppData\Roaming\Logitech\SetPoint
File Names:
* user.xml
* gamelist.xml