[shentar]

Is there a way to make calibre to recognise a new extension as an ebook (eg recognize .nef as New Ebook Format)?

I know I can add files of any format by explicitly selecting them in the "Add books" dialog but if you have a lot of them in a directory tree calibre will not find them as it does not know that .nef is now an ebook. I am hoping there is a formats.xml or similar file somewhere which controls this behaviour but if there is I can't find it.

Thanks,