Hi all. This is labraxmauler from Spain. I'm new to the forum. First of all, let me apologize if this is the wrong place to post my question. Here it goes:

I recently downloaded and installed Edit Orders 2.1 from srturner47's website, but for some reason I can't manage to make it work. I can edit orders (add & modify products with their attributes) but once I make a single modification, my order total price resets to "0.00". There's no way I can change it once I start editing orders. Moreover, this "0.00" order total stays there when I go to Admin > Customers > Orders.
However, if I go to Admin > Reports > Customer-Order totals I can see the real order amount.

Any ideas about where the mistake is and how to solve it?

My Zen Cart version is the latest available, as stated by the "Check for updates" tool.

Thank you very much for your kind help.