wow. 1 post and already jumping into some nitty-gritty....
i have no good answers on that one; the current maintainer of the plugin has done an excellent job of straightening this plugin and making it workable. why the original author choose to do it that way is another question.... but addressing that issue seems to be a massive amount of refactoring and the potential for bugs is great...
there is a plugin to address some extra fields you may have added to the orders_products table here:
https://www.zen-cart.com/downloads.php?do=file&id=2292
i do not remember if i did something as well to address the attributes for products.
best.
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