At present the output format is "Mobi" this seems to be the default setting.
I want to have "EPUB" as the default setting but cannot seem to be able to change this setting.

Has anybody got any tips and/or advice that will help me to change the default setting from Mobi to EPUB.

Thanks in advance

[Bohica60]

Preferences> Conversion> Output Options> Epub Output - then hit Apply

Doesn't get too much more straightforward than that.

Thanks, I did try that way but it still keeps reverting to Mobi

[Bohica60]

And you are hitting the Apply button after selecting Epub Output?
(Bottom right corner)

Not just selecting Epub Output, then closing Preferences?

Then I don't know what to suggest.

I did hit apply. I decided,maybe, the best way forward is to completely delete everything to do with Calibre and do a complete re-install & see if by going right back to the start I can set it up as EPUB output by default.But thank you for the advice,I do appreciate it.