I've just submitted v1.2.1 to the plugins for review. This version contains the changes associated with the following issues (identified by their GitHub issue number):
#91: Back-ticks required around database field names.
#92: Enable special handling for handlers with fixed-field headers.
#93: Check for the php-mbstring extension; message if not installed.

Once approved, you can download the update here: https://www.zen-cart.com/downloads.php?do=file&id=2091