Great app, thank you!

1. It would be great if under each option there would be and explanation when it's used and what for. I have used this tool few times, and every time it's trial and error of dropping app on both options and then trying to run unsuccessfully, then dropping on just one of options, and so on.
   The subtitle can be in this format: Disables …, allowing to install the app that's not from app store. If you do this then you'll need to … when you …
2. It's way too easy to disable gatekeeper. Especially that most of users download Sentinel just to instal some app, but then… "let's click this cool switch, why not? maybe Gatekeeper supposed to be disabled if it's a switch in this app.".

• Great UX is not making users guess and confused.
• Burden of knowledge: you can't imagine how a user may not know this simple common concept.