Though I'm certainly not qualified to update this mod, but while waiting for an official update,

I edited the:

/includes/modules/shipping/usps.php

by changing the word Package

to Parcel

In 4 places in the file where it was related to International First Class

Copied my USPS userID and settings.
Removed the mod from within Admin
FTP the changed file to the site
Installed the mod and restored my USPS UserID and settings.

First Class International Parcel now appears as a choice.

TNX Ajeh. I got the idea by comparing the new and old Stock USPS modules for differences.