Hey, I changed the default mode to 'Glory', which means your dwarves will be revived if you win the battle. The old (and true) mode is 'Death', you can change it in the options.
Steam demo will always be more up to date.
I'm working on the 'Raids' feature which will only be available in the official version on Steam (fighting against trolls and dragons). Everything you see about that are just teasers from the devlog.