Remotes do not have reset button, if you're referring to button in the battery compartment that is pairing key, it will not reset a thing in the remote. It used to pair a remote to particular roku device. Only wifi remotes have this. What model of roku do you have?
I'm having same problem. Neither my remote nor the app for a Roku Remote are working. I've reset Roku, signed in and out. I even tried to add a new remote and it can't "find" my remote in order to add it..