Rescrape fanart/banner/etc

Hi,

Is there any way to tell MC to regrab all of the banners and fanart? I want to switch from posters to wide banners, but it seems to require me to manually do it with either show selector or the posters tab.

Also, since my initial discovery and scrape, it no longer seens about 60% of my episodes, just seeing empty shows for them, any reason for that?

adam.