If you find the library is slowing down, organize your files into sub-folders by publisher or language to improve performance.
Download and install ComicRack and go to File > Add folder to library to import your e-comics. ComicRack
Since the original development has slowed, many users have moved to the ComicRack Community Edition (CE) , which includes modern bug fixes and updates. If you find the library is slowing down,
Convert your comics to .cbz format . This allows ComicRack to write metadata directly into the file, making it easier to manage in other apps like Ubooquity . ComicRack