I added link to my GitHub so you can try it out. I have no Idea how to make the Attachment open for registered users.
But to come to your question, you are talking about something different. As far as I know the Reg-Entry you posted is to enable App Development without needing a Developer License.
My code will put your Machine into TestSigning Mode (take a read
here: )
usually you do this by issuing this command in an elevated CMD: bcdedit /debug on
Thus enabling TestSigning-Mode and making the Machine open for Remote Kernel Debugger Connections such as through WinDbg. Enabling this mode requires you to restart your System. Then you will be able to load Drivers (.sys) files without a by microsoft issued license.
My Patch will put your Machine into TestSigning-Mode at runtime, so you will be able to load unsigned kernel drivers without a license and without having to reboot the machine...