Congrats! The new version seems very robust and nice!
However, I must complaint about
Implement issue 1610: Use html instead of xhtml as the default extension for new blank HTML files.
Please, reconsider this issue.
Case: If we open a previous document (properly numbered xhtmls inside) and add/divide a section, it starts over with "Section0001.html"!
And bulk renaming isn't a help, bc it doesn't touch the extensions…
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BTW, I belong to a small community of editors. We make books using templates (created with previous versions, as usual, all with .xhtml).
With 0.60, we will have to update all of them!
In addition, we have external collaborators who continue using previous versions of Sigil (even 0.34, with old PCs)... Can you imagine the problem of working between versions?
Please, please, at least put an option to choose the new/split sections' extension! It would be perfect for us!
TIA
jugaor
(sorry for my bad English)