I see you are also asking for help for the same problem in another thread:
If you do want to post the same thing in multiple places, I would suggest linking back to the same post to encourage discussion/help in a single place. I think that is easiest for everybody--otherwise, you get ideas scattered around various threads, like there is now. So...I guess this is me linking back to that thread now for anyone else who sees this. 
As for the question on how to update: I don't use this app myself, but the code looks like an app. So, yes, you should see it in "Apps Code." Also, because it's not clear if this is what you expect: simply adding something to Apps Code does not install an instance of the app on your hub. You need to go to Apps > Add User App to actually use/install the app (similar to what you need to do when using a built-in app, except it's a different button...and you need to add the code first).
I'm not sure why HPM isn't working for this, but the ideas I mentioned above are still what I'd suggest if you want to use HPM. Otherwise, manually updating might work around the problem and shouldn't be too difficult.
Good luck!
