This morning, I downloaded a version called 16.3 from their website. I was running an app named version 18.1 and assume they've changed their numbering conventions. Next, I had to sideload onto my Nvidia Shield. However, as the app isn't designed for Android TV, I have to create a menu icon so it can be easily selected from the home screen.
It doesn't take a whole lot of time but it's inconvenient. I did this just now.