Thanks! I don't think I've had the Calibre plugins that long, but it may have been longer than I thought. I'll try and see if downloading and installing the newest version works. The only plugins I have installed are the ones from that package. They are all installed in Calibre under "File Type Plugins." Before I delete them to reinstall, are any of the plugins listed under "File Type Plugins" *not* from the ApprenticeAlf downloads? I don't want to accidentally get rid of anything I want to keep that won't be replaced