Migrate from UE Smart Radio (UESR)
Note
Please note that Smart Radios transitioned to Squeezebox Radios will require Lyrion Music Server. Install it before you continue the migration.
To initiate the transition, power down the Radio, and restart it.
After a restart the Radio should start downloading the new firmware, followed by another reboot and a factory reset:

Choose your preferred language. Then follow the network setup according to your environment.

When asked to create an account on MySqueezebox.com, skip that step and continue without account by pressing and holding the "Back" ( ) button on your Radio. You should then get the main menu where you can select "My Music" to connect to your LMS.
If you get an error "Problem Connecting - There is a problem connecting to MySqueezebox.com", you should be able to scroll down to "Switch Library", from where you can connect to your LMS.

Manual Migration if config.logitechmusic.com is down
Connect to the UE SmartRadio using SSH. Add the following line to /etc/hosts using vi (or use something like WinSCP):
94.126.17.210 config.logitechmusic.com
Restart the device using the following command:
> reboot
This "hijacks" the host name config.logitechmusic.com and points it at the same host as www.herger.net. As we don't own the logitechmusic.com domain name we have to trick the device to believe the host was still up.