I have checked your account and gone through your account and it should work fine.
Can you please before launching the Cloud again, follow the steps below and then trying again to launch any Cloud apps :
Clean up cached user login information.
- Close the Creative Cloud application.
- Navigate to the OOBE folder.
Mac OS: /Users/[user name]/Library/Application Support/Adobe/OOBE
- Delete the opm.db file.
- Launch Creative Cloud.
If you are not able to access to this library, please follow the link below :
Please, let us know how it goes and if the problem is solved by the steps above.
Thank you for your help.
Unfortunatly, it didn´t help. The box was there this morning. (it only shows up one time per day, regardless how often I log in or out)
Thank you for the update regarding the issue.
Can you please create a new Admin account and to verify if the issue still stands : http://support.apple.com/kb/PH11468
Please, select Admin and not User to verify the problem.
Let me know when it will be done.