Same thing here with my HR21-700. Black screen, will only show recorded content. Re-downloaded CE again Saturday night, same results. Guess I'll get the NR in the morning. First time I've ever had to go back to NR.
In theory, you should have gotten the exact same software Saturday as you did on Friday, and you did.
If/when you go back to the NR, let us know if it's back to the Old SD gui or the new HD one ...
Some have said that the HD one is the NR now, but I haven't been able to verify that yet.