All I can tell you that on my end when I updated sforzando just now (they've already issued yet another update for app and engine just last night!), the engine got updated accordingly in just one installation.
Now, whether this very convenient scheme only applies to the Mac, I cannot be sure of, but that would surprise me a lot.
So try just updating sforzando and see for yourself if that won't solve both in one go like it did mine.


Just because you can, doesn't mean you should!
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BBox 2022 Audiophile, Mac Pro Intel, OSX 10.6.8, 800x600 (TV VGA)