Dell mouse side buttons

I have a dell wireless mouse WM326 that has side buttons that go forward and back when you touch them. This makes the mouse practically unusable for me since it is constantly changing pages since my fingers rest right where the buttons are. Is there a way to change what these buttons do or at least disable them or something? If not is there a way I can open up the mouse and physically remove the buttons? Or is my only option to get a non-Dell mouse that allows practical customization without having to scour the internet.