Logitech M557 Mouse

I have a Logitech M557 External Bluetooth mouse with a Windows button on top of the Left/Center/Right buttons for clicking. Is there a way I can use this button with BTT? When I try to set it up nothing gets registered in the "Click here to select mouse button".

Set a custom action for the mouse button in the logitech app. Use assign keystoke and assign something not used from the keyboard. Function keys especially f13-f16 works pretty well. Then in btt set a shortcut and use the keystroke as a trigger.

In otherwords youre going to set the mouse button to function like s keyboard key and btt to trigger an action in response to the keyboard click.