If you are already running version 15.0 SP1, the upgrade requires a clean slate: Export your current projects as files and save custom libraries. Uninstall: uninstall version 15.0/SP1 before proceeding.
Version 15.1 represents a significant iteration in the software's lifecycle. While earlier versions focused on establishing the Unity Pro architecture, versions 15.x have refined the user experience to align with the strategy—Schneider’s IoT-focused architecture. i--- Control Expert 15.1 Download
The keyword provided appears to refer to "Iconics GENESIS64," "Schneider Electric EcoStruxure Control Expert," or a similar industrial automation software. The string "i---" is often a redacted or typo-ridden reference to specific legacy software builds. If you are already running version 15