Related feature request Allow shortcut ⌘R to relaunch already running compositions would provide a shortcut in Vuo Editor to relaunch a composition.
This feature request would provide a shortcut in the composition to tell Vuo Editor to relaunch it, as suggested by @Pianomatic —
even better would be the ability to do this within an application when run via the Vuo Editor, being careful not to override composer-implemented keyboard controls, should they overlap with said shortcut.