If you're already using Soholaunch, you can update to the latest version via Pro Edition's built-in Software Updates feature.
Screenshots taken from "Edit form" screen inside the completely-redesigned Forms Manager 2.0 feature that is now part of both the base and full versions of
Soholaunch Pro Edition Website Builder (v4.9 r58 and later).
Plugin version update button, function, etc is part of the Plugin Manager feature. Plugins and the Plugin Manager are only available in the full version
of Soholaunch Pro Edition (buy full version | compare base vs. full version).
When your customers buy something from your website, you can now set up your checkout process to calculate shipping charges differently based
on what country you'll be shipping the item to.
All of our public websites (excluding community forum and bugtracker) are developed and maintained using our Soholaunch Pro Edition sitebuilder --- the same product we advertise and sell on our site.
The more I play with this software, the more I like it. 
