Pull the top menu when the phone is “locked”, System > Applications, kill the app: voila, no more fake lockscreen.
Also, my other beef with that app is that it registers itself as a home screen app. That means it doesn’t coexist very well with other home screen apps and messes them up massively more often than is acceptable. I use Lawnchair, and Smart Pass Lock NFC makes it lose its marbles each time it takes over the home screen.
I mean, good effort to bring back what Google stupidly amd unilaterally decided to take away. But at the end of the day, it’s a poorly-working hack - no fault of the author’s though…