Used the tduk app killer yesterday on the buzz x5 and I almost had a heart attack. When I exited the app it went total black screen so I hit the home button which brings me to wolf launcher and it did but all the apps were blank squares, I could move the cursor around but no matter what I clicked on nothing happened, tried wechip airmouse remote no luck either. Finally last hope after 10 minutes of pure panic I unplugged it from the wall power, waited 10 minutes, plugged it back in and thank God it all came back. Just uninstalled that app.
April 7 Update: Just sideloaded the updated version of app killer and with the new exclusion box checkmarked, it now works like a charm. Thumbs up to @TechDoctorUK, keep up the great work 