It's still opening as a notepad file.
That is odd - a .reg extension should not do that.
-- Rightclick it and see if you have the option to Run or to Merge.
Let me prepare it and attach it and see if that works.
--- OK - I changed the extension and when I rightclick it I get the option to Merge. Hopefully that will work. Extract it from the Zip and give it a go. DoubleClick ought to work too.
Remember to reboot after.
I thought I was doing it the easy way before because we cannot attach files with a .reg extension.... LOL!