Not all .mobi books showing in Format column
I'm usiing Calibre 9.12 (64 bit) on Windows 7 (64 bit)and I'm hoping someone can help with a problem I'm having...
I've always sucessfully used Calibre to look after my .epub files but being the lucky recipient of a new Kindle Fire I need to now manage .mobi books too
I've added my base collection to the library and most of the .mobi files I have show up perfectly well - however not all show as a 'format' in the format column
I have no problem opening them from my books folder but in Calibre they show as 'xxxx has no available formats'
Any ideas what I'm doing wrong?