You said "remote is stuck on new features launch page" and I want to make sure I understand what you mean. Since you said you don't have a remote, are you saying that your Roku app that is functioning as a remote has something other than the remote controls showing? Or did you mistype, meaning to say the Roku is stuck on the new features page?
If the latter, then your app, if it's connected to the same network as your Roku device, should control the device.
Pursuing that, with the app open, at the bottom, there should be a "Devices" icon. Touch it. Does it say you are connected to the Roku device you're trying to control?
DBDukes Roku Community Streaming Expert Note: I am not a Roku employee.
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I am having the same problem. The OS 10.5 screen comes up (promising new features!), and there is not a button on my remote that will move it. I hear a beep, and the light on my Roku 3 blinks when I press a button, but the 10.5 screen doesn't budge. I have tried different approaches to start. I have reset the Roku and the router. Alternate remotes on my tablet and my phone (both say they are connected to the Roku 3) do not work either, so my Roku is totally inop.
I still cannot get mine to work! I unplugged it for 30 seconds and nothing. So I unplugged it again for about an hour. Plugged in back in and it still will not clear from the new features screen. This is frustrating!