How to program middle thumb button on mouse? [SOLVED]

Jun 21, 2018
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I just got a Yocktec ZK-M88 ggaming mouse and it has 3 side/thumb buttons. I went to bind the middle side/thumb button and it showed up as the left mouse button. I have tried X-mouse button control but again it showed up as the left mouse button. How do I make where it is not the left mouse button but a completely separate button?