Part 1 of Module Writing Tutorial is not working

Topics: Writing modules
Jul 28 at 5:48 AM
Edited Jul 28 at 5:49 AM

I followed this tutorial step by step. I can build my project with no errors, but when I enable the 'Featured Product' module and try to add it in 'Widgets', it doesn't show up.

I downloaded the zip file containing the tutorial project for up to that point and my project is nearly identical. The only difference I can see is I am on framework 4.5.2 instead of 4.5.1. Should this make a difference?
Just to make sure, I copied and pasted every folder and file from the tutorial zip into my own code and ran that. The widget still didn't show up.

I'm on Visual Studio Community 2017 if that makes a difference.

What else can I check?