Nope the hosted version is awesome because you don’t have to tinker with it! So long you know the IP, port, and password you can access your device from anywhere by just going to Ray’s hosted version. All the settings are stored only in your browser and never even cached/stored on the server.
So the only trick is getting the right port forwarded.
What you quoted above was not tailored to the OSPi so let me make a small modification for RPi users. The interval program defaults to port 8080 so just change port 80 in what I said earlier with 8080. When you visit the hosted app and it asks for the device IP you will use your external IP from http://wimi.com and the port 8080 so it looks something like:
208.29.190.24:8080