You need to wipe all traces of older Creative Suite (CS3-CS6) or CC products to start fresh. Critical Pre-Run Checklist

Ensure all project files, custom presets, brushes, and plugins are saved externally. The tool may delete folders containing these assets.

Right-click the downloaded file and select "Run as Administrator" (Windows) or double-click and enter your system password (macOS).

You cannot install or update apps despite having a valid subscription.

It is an official utility released by Adobe. Unlike the standard Windows or Mac uninstaller, this tool digs deep. It removes corrupted installation records, orphaned registry keys (Windows), and damaged license files that block new installations.