Do all that and you should see the Developer secret screen:
Write down the IP address and the username that is on your TV screen (do not write down the one you see in our pic above, this is not your IP)
Take note of the password you set, ideally in the same place you took note of your IP address and username earlier. Your Roku will now restart.
On a computer (WINDOWS PC ONLY, MAC’S WILL NOT WORK) connected to the same network as your Roku, open your web browser (FIREFOX RECOMMENDED). Paste the IP address you wrote down earlier in the URL bar, then hit Enter, and you’ll be asked for your username and password.
Remember these? Enter them, then click “Log in,” and your browser will open developer mode.
HERE IS THE APP:
Download this APP to your PC and save it. (Remember where you saved it on your computer, it will usually save in your downloads folder)
Your browser has now opened the Development Application installer.
Click the “Upload” button, then point your browser toward your ZIP file.
The file name should be beside the “Upload” button.
Click “Install” and the installation process will begin. When its done, your app will instantly open on the Roku.