Originally Posted by sasilk
Thanks for that. For some reason the two seemed to be mentioned together a lot, so I thought they were connected in some way.
I'll try loading a .mobi file and see what happens.
You can rename any MobiPocket ".prc" file to ".mobi" and modern versions of the MobiPocket Reader will load it fine.
The only reason for the change of extension is, I think, because ".prc" is used by other types of file too, whereas ".mobi" is unique to MobiPocket.