Upgrading Virto Forms
If you already use Virto Forms and need to upgrade it to the latest version, download the package for your SharePoint version:
Unzip the file and run the setup program as described in Installing Virto Forms.
On the step check the box “Upgrade” and click “Next”.
Note: if you had activated the license while installing the previous Virto Forms version, you do not need to activate it now.