Hi Simon,
Welcome to the forum and you have come to the right place. There are sometimes reasons to update firmware because there are many new features that have been implemented in recent times but it's not always necessary to update.
It's very easy to update the Xcruise 385 via your network connection as you have found out!
Ok you need to change an option so that the Menu's are displayed as Icons. Press Menu on the remote and head into the Configuration/Display setting menu. Change the Default Menu Type from Main Menu to Icon Menu. Exit out and next time you press the Menu button on the remote you will see icons display including the TV+ icons etc.
Leroy
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