Trying a hard reset to see if I can fix the problem, but basically the DotView case only worked after hitting the power buttom. When I closed the DotView case, the screen wouldn't turn off, but instead went black while at the same time leaving the status bar on at the top (could see the signal strength, etc through the case). It was as though it was trying to pull a program up but failed. After hitting power, I could then swipe to use Cortana, but nothing else works. Open up the case, and I'm back to normal.
Hopefully this reset will fix it
Edit: Reset fixed the problem. I now have a section in the Settings App called Dot View, which was not there beforehand.