It's same as for BV. Setting->Plugins->WebRadio->UpdateStreamList
I just checked it and I have all RadioChannels. I'm using the WebRadio version for MP2.2, but should nto make a difference though. It was just updated in terms in compatibility as far as I know.
Can you please try attached version. Just extract into skin folder of Webradio plugin and overwrite existing WMCSkin (you may backup in advance).
For me it solves the problem and shows the menu again.
Yes it works now, thanks!
I have another thing: Would it be possible to add an "easy" switch between audio streams (in my case webradio and TV) like it is in BV. Or does this not fit into WMC style?