Well, I did this as the standard user in the terminal:

rm -Rf .config/pyradio

This does blow away my credentials, forcing me to re-enter my Pandora user name and password the next time I launch pyRadio.

However, I'm still not able to play any music. It just sits there with the channel name appearing in the drop down menu, but no album art nor any music playing.

This is on the N9, BTW...