Thanks very much everyone ;-). I've haven't logged in for a couple of weeks and assumed I'd be subscribed (and get automatic mails) by default.
My sources are .epub, which answers Toxaris's question.
One follow-up question: at
https://github.com/user-none/Sigil/releases there's no mention of Linux. I want to run Sigil on Linux, rather than upgrade my W7 machine. Where can I find the Linux release for 0.8.4?
Thanks again.
b