Originally Posted by NiLuJe
@TheSacredSoul: The cached covers are stored in linkss/cover_cache. The files are named according to the book's ASIN. Deleting the corresponding file, switching to another book, then the updated book again should be enough to rebuild it. (Don't just empty the cover_cache folder, there's some default stuff we need in there, besides the generated covers
Ah, I didn't delete the 4 default and overlay files
And happy to report working fine on 5.3.3 after reinstalling the hack.