macOS 11 Big Sur or newer (macOS 15 Sonoma is recommended). Disk Space: At least 5 GB of available local disk space. 2. Force Quit and Restart the App

If basic troubleshooting fails, a complete reinstall is the most reliable fix.

Go to Control Panel > Uninstall a Program . Find "Clio desktop app," uninstall it, and then download a fresh installer from the Clio Manage Documents tab .