Welcome.
Use Help > Check for updates to ensure you have the latest version of all plugins (particularly the IMDb plugin).
I don't think there are any working cover plugins. Most cover sites are better accessed via the Web Search feature anyway (because you need the site to select the cover).
I think the only poster plugin still working is TMDb. That's not so bad, as it currently has the best quality posters anyway. Unfortunately, it only gets all the posters available for a movie (as does the TMDb movie information plugin). That doesn't work so well, as popular movies can have a dozen or more fairly high resolution (the standard being 1000 x 1500) posters. I prefer to run the movie information plugin without the option to get posters, then use the resulting URL to go to the site and choose the poster I want. That works fine when adding one or a few movies, but not when you have hundreds of movies to update. I wish the plugin were modified to get only the default poster—so we could allow it to do that automatically. If we want more, or to look for a better one, we can always visit the site.
The beta version uses the same plugins, but includes a new feature very useful for collecting images. Images on the clipboard can be pasted directly to an image container. For getting one image at a time, visiting the source and copying the desired image is arguably more effective than using a plugin. Unfortunately, the cover and disc containers aren't yet working, but hopefully that will be fixed soon.
