Firstly, the “put” save is now the default for current TiddlyWiki and newer. This is kind of a big deal since it should help prevent accidental overwrites, though I’m hoping most users won’t notice the change or need to care about it. There are more details in the FAQ. Please let me know if you hit any bugs or unexpected behaviors.
Secondly there’s a new “Clone” option, which I think will be useful for people who have a favorite set of plugins and customizations that they’d like to easily duplicate when creating a new TiddlyWiki. Find it in the site “Actions” menu. Thanks @twMat for this feature request.