... and thanks for posting back the solution!
I've just submitted v1.7.4 of UPSXML to the Zen Cart moderators for review; I'll post back here once available for download.
This release contains changes associated with the following GitHub issues:
#14: Remove unwanted slash in shipping-icon link
#15: Remove quotes around numeric-field values in installation SQL
Now available for download: https://www.zen-cart.com/downloads.php?do=file&id=126
Now available for download: https://www.zen-cart.com/downloads.php?do=file&id=126