Open up the system preferences and then open the Contour Mouse interface.
Hold down the option/alt key on the keyboard and click on the ‘advanced’ button in the Contour Mouse window.
You can release the option/alt key when the ‘advanced mouse speed and movement settings’ window pops up. You can then go about changing this function.
Go to the system tray and you will find the Contour Design icon.
While holding down the shift key, left click on the icon and select ‘quit’ on the menu that pops up.
That will deactivate the software and you can then make changes on the mouse.
After, you can reopen the software and the changes will be saved.