[pkscout]

@pkscuot, thanks for info, there are many artists with more 50 albums, it´s normal...about off-line mode, my goal not is download image, but show images, but your script only work for us, if running one song first, imagine this situation i have artists, if press button info artist or info album, don´t show discography image, only work (show images) if first run one song (playlist) work very well, maybe more clear now for you.
Understand your explanation about API about years, fine,

First, I fixed the issue with the 50th album information not being cleared out. There's an updated version here you can test. I'm going to wait at least a few days before sending in another pull request, as I don't like to do lots of pull requests in a short period of time.

As for the issue above, I see what you are trying to do. Unfortunately, Artist Slideshow is designed to work based on the playing song, and it would be a major undertaking to rewrite it to do something different. That said, there is a potential work around. As of Artist Slideshow 1.3, external scripts can call Artist Slideshow and pass in information about an artist to use in a skin. If your skin ran a script that passed in the artist name, that would trick Artist Slideshow into downloading images (and artist information) even if there is no song playing. There is information on the wiki page about that, and I know XSqueeze is using this feature. Whether it can be adapted to what you are trying to do with the skin isn't clear to me, but it's the best option I have for you.