Go to the Developer Application Installer web page of the device. Click on "Utilites" and you'll see "Package Utilities". Click the "Upload" button and select your package. Then just type in the password (or copy and paste) and click "Rekey". I hope you saved the password somewhere!
🙂 Now the next time you package something it will use the key from the uploaded package. You don't need to do this again until the next time you want to package under a different key.
-JT
Roku Community Streaming Expert
Help others find this answer and click "Accept as Solution."
If you appreciate my answer, maybe give me a Kudo.
I am not a Roku employee.