Quoted from Adobe web site: https://helpx.adobe.com/manage-account/kb/troubleshoot-creative-cloud-sign-out-sign-in.html
The Creative Cloud desktop app is critical for working with Adobe apps, but if you’re having problems installing apps because it has been corrupted, you should uninstall and reinstall it to fix the problem.
1. Uninstall the Creative Cloud desktop app using the Creative Cloud desktop app uninstaller.
2. Sign in to the Creative Cloud desktop app download page.
3. Click Download in the navigation bar and follow the onscreen instructions.
