Version v5.1.8

x [Movie sets] fixed sorting of movies in movie sets
x [TV shows] fixed a performance regression when loading TV shows with many episodes #2977
x [TV shows] fixed an error when downloading thumbs for episodes with no video files #2981
x [TV shows] enhanced 4 digit episode numbers detection
x [TV shows] fixed importing of NFO files with episode groups #2962 #2850
You may need to re-write TV show NFO files once to get the correct values inserted
x [Movies/TV shows] aligned thumb artwork sizes to the ones offered by scrapers #2989
You may need to re-view your artwork preferences
x [Movies/TV shows] enhanced artwork choosing algorithm to prefer similar artwork sizes in the fallback
x [Movies/TV shows] cleanup of invalid/null values on startup
x [NFO] allow writing of non HTTP trailer URLs to the NFO #2962
x [UI] improved loading speed of tree tables #2977
x [IMDB] scale actor image size (as before) and only scrape portrait ones #2979
x [FFmpeg] check if the ffmpeg executable from the settings exists before using it #2986