I'm not sure I understood all of that (meaning I didn't), but given my fairly old OS I was pretty hopeful that it would work but it doesn't smirk
After dropping the included "Blues #40.mjb" file onto MJBLite as instructed, I get an applescript error (of which I understand even less) and then have to force-quit the program to get out of it again. Is this the error you're now referring to?

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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)