Lost genkey for signing package in Developer Dashboard.
Want to transfer key over to use new device for updates to older packages.
You'll need to generate a new password by rekeying your package. You can find more on how to do this at Packaging Roku Channels.
If you require login for users, regenerating a new genkey will force all users to login again and your channel will lose all registry data.
There is no way to retrieve a genkey once lost, so store this newly-generated one for future use.