I realised recently I'm missing a few thumbnails, so tried the Remake Thumbnails option form the config. Alas, I now have no thumbnails at all!!
I have checked the config, and make thumbnails form PDF is on, GD Library and ImageMagick are both present. Clicking Save after turning Remake Thumbnails on takes me to somewhere else, but the page is blank.
Can you let me know if I am missing a step? I am using jDownloads Version 22.214.171.124