Considerations when upgrading to Enterprise 4
Upgrading to Enterprise 4 requires version 220.127.116.11 or later. Versions prior to 18.104.22.168 cannot be successfully updated to iMonnit Enterprise 4.0.
Backup existing site
Prior to performing an upgrade to Enterprise 4, you will want to backup your existing Enterprise installation as indicated in this article.
Remove current Installer
In order for the installer to reference the correct installation scripts, the existing installer must be uninstalled if it is still available on the current system. You should be able to use Add or Remove Programs in Windows to remove the existing Enterprise Setup Utility (or similarly named) installer.
Because the Enterprise installer requires Administrator privileges, the user installing must have full administrator privileges to write to the C:inetpub directory. You will also want to be sure to right click, and run the installer and Enterprise Configuration Utility as Administrator.