[AlexBell]

I design ebooks in ePub format, and in the past have used calibre to convert the ePub file to AZW3 so that it can be read on Kindles.

Last night when I converted an ePub to AZW3 the operation seemed to go as usual, and the output file is in AZW3 format. But the icon for the file is the calibre icon instead of the mobi icon, and when I click on the file it opens in calibre instead of as a mobi file. I haven't seen this before; previous azw3 files have shown the kindle icon and opened in the desktop Kindle reader.

What am I doing wrong? Have I missed an announcement somewhere?

I converted the same ePub file to mobi with calibre, double clicked on it, and it opened in my desktop Kindle reader. Will this mobi file work in the later Kindle ereaders?

PS I update calibre every time an update becomes available.