How has there been no response to this? I want to change one of mine and cannot figure out how to do it.
The OP is only talking about the roku Ultra RC-AL9 remote with 1 & 2 keys that hold voice search. They're not talking about changing the 4 logoed keys which are permanent and can't be changed ever.
So to answer the OP question, you simply do a voice search and if you like the results, press and hold the 1 or 2 key it will replace whatever voice search was there already.
I feel like I have tried that but will try again this afternoon to see if that works. Thanks.