I've just submitted v4.5.3 of Edit Orders.

This release contains changes associated with the following GitHub issues:

#158: Document the configuration required for stores with separate tax-rates on shipping.
#167: Early rounding causes products' pricing errors when prices have more significant digits than the currency supports.
#169: Use 'floatval' instead of a float-cast to reduce penny-off calculations.
#170: Correct PHP warning when shipping is removed from an order.

Now available for download: https://www.zen-cart.com/downloads.php?do=file&id=1513