Application Switcher and Better Touch Tool

I have KM set up to open the Mac Application Switcher. Per a video I watched, I should be able to map this to a mouse gesture with Better Touch Tool. And indeed that works, until I try to actually select one of the applications with my mouse. 90% of the time this gives me a drop down menu that won't let me actually open the app. If I hover over the icon and hit Return (once I get rid of the drop down) it works as it should. But I want to just use one hand and be able to click on the icon.

I'm using KM 8.1.1 along with the latest version of BTT on an iMac running High Sierra.