In short: Flicks → your film → every render is kept as a version. Restore one to make it the film again, without rendering anything.
Flicks makes short films for you. When a film is rendered again, the new one used to land on top of the old one. Now every render is kept as its own version, so the film someone signed off is still there.
Versions are kept for every film from this release onwards. The Versions list and the restore action appear on the film page together with storyboard editing and re-render.
Every render is kept for you
You do not have to save anything yourself. Each time a film renders, that render is kept as its own version. A later render lands beside it, not on top of it.
Know what a version holds
A version is the whole render, not just the video file. It keeps the video, the poster image, the looping preview, the still on each shot, the storyboard it was made from and the film's length. The rough cut is a working copy and is not kept as a version.
See every version of a film
Versions are listed newest first, numbered 1, 2, 3 and so on. Each one has its own video, stills and storyboard, and the list shows which version the film is playing now. Where the film was edited before a render, that version also carries what was changed since the render before it.
Put an earlier render back
Restore the version you want, and the film points at it again. Nothing is rendered again and no version is removed, so you can switch back the same way. You cannot change version while a film is queued or running, so wait for it to finish first.
Check the film after a restore
The player, the poster, the preview and the storyboard all switch to the restored render, and the length updates with them. Each shot shows that version's still. A shot the restored version has no still for shows none, rather than a picture from a different render.
Films made before this release
A film rendered earlier is listed as version 1, and its files stay exactly where they are. The render it is showing is kept before any new render lands. So you can still go back to it after you render that film again.
Deleting a film deletes every version of it, not only the one it is showing. Nothing else is tidied away, so a film with several renders uses more storage than one with a single render.