I’m happy to see the results upgrading from Zen Cart.
I’m currently using the default themes customized to a way that I like.
Suggestions/feedback are welcomed.
Thanks
A link would help.
The text looks a little heavy to read. You could try to break it down a little more, add subheadings, ect. also could add some popular products on the homepage.
Did you sell your soul? Really Electronic Cancer starters? 
I like how you broke up the Category menu.