I answered to the email, providing also the .zip of the plugin. Maybe try checking in Spam.
For what concerns the settings of the plugin, I created a shipping zone for Italy and assigned it to the plugin.
Then I created the following Shipping Rules:
For the rest of the world zone, which is EU only, I’ve assigned the UPS Live Tracking plugin, as said before. It fails even in those zones (i.e. France or Germany). But, let’s try to solve the Italy problem first, which is much more important right now.