Would it be beneficial to upgrade my version of OpenCart?
Well, if you're not familiar with OpenCart, better don't try, or you will end up
in frustration only. It would then only be beneficial for a professional, but
sure not for you, and it could cost you a lot of money, to make it work again.
Better tell us, if the Shop is working now, and possibly add a link to the shop,
so, one could find out, what you have, and how it now looks. And then, I could
tell you, what needs to be done, to possibly improve your Installation, to meet
latest specifications, without destroying a working installation.
Ernie