In SetPoint you need to set the buttons to key presses that you don't use when you're playing. Like N, J, K, L, ;, etc. You can either do this for all applications, or figure out which .exe is running ...

All in all, the MX Master 3 is a great mouse. If you’re right handed, it’s comfortable, customizable, and sturdy. Easy Flow is good for switching between Macs, but it still needs to work out its kinks ...