Blender & Middle-Mouse

I've been away from Blender for a few years, and I haven't kept up with its interactions with BTT, but I used to use fn+trackpad mouse with BTT as middle-mouse with Blender on my MacBook Pro. Unfortunately, the BTT setting I've tried does not work with Blender now: Normal mouse -> fn+left-click => middle click. Blender just does nothing when I try to use this for middle mouse operations. The only thing I can think of is that Blender is using middle-mouse-drag, and that's not what this setting gives me. Any ideas how to make this work?