Favorites - Names, Icons, Caches?

Hi-
So I think I got the SiriusXM Streaming working with PlayHLS plugin (yay!)

The initial station I 'tuned' just shows the url of the stream. I found out I could go into the favorites setting via the web and specify a name.
A newly added favorite with an url and a name worked - I got the name
But nothing I can do seems to make the original station show it's name - is there a cache or something I can delete that will fix that up?

Then I was hoping to have it show a graphic (at least one for each URL. And I found I could edit:

C:\ProgramData\Squeezebox\prefs\favorites.opml

And I placed the graphic (a png) here:

C:\Program Files (x86)\Squeezebox\server\Slim\Plugin\Favorites\HTML \EN\html\images

Again it worked for a 'new station' but I can't seem to edit any existing favorite to get an icon.

How do I get the radio to show all of this? The web control shows the names and icons as I'd like, they just don't seem to reliably get to the Squeezebox Radio.