Restoring files if your Duplicati installation is lost is where you might start, to get important files restored fast.
Doing Recreate in Database management is where you would go to get the entire database back so that the existing backup destination (with all its versions) can be fully utilized. Recreate can be slow, or can hit errors. People who use Duplicati mainly for disaster recovery might just abandon old versions after restoring recent.
Does it make sense to backup Duplicati config and db files? is a currently running discussion on practices…