Export All Sequences translates every .seq in your project to a separate vendor source file in one pass. It runs the per-Sequence translation in batch, so it only appears when at least one translation provider extension is installed.
Using the menu: right-click your machine file in the Explorer and choose Export All Sequences.
Using the Command Palette: press Ctrl+Shift+P (or Cmd+Shift+P on Mac) and run AutomationView: Export All Sequences.