What version of EPUB is installed on Scrivener 1.9.16.0

Scrivener Scrivener for Windows
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1

Is it possible to determine this on the program?

2

The old version of Scrivener only compiles ePub2 formatted ebooks. You could use a tool like Calibre to convert to ePub3 if you need it.

3

Many thanks. I will try calibre