This is normally a result of not having the required permissions to write to the System Registry.
Please try the following:
1. Open the Windows Registry Editor
2. Navigate to HKEY_CURRENT_USER\Software\Mindjet\MindManager\11\Settings
3. For entry 'LoggerInvitationShown' set the value to '1'.
4. For entry 'AllowLogging' set the value to '0'.
I had the same problem. After short investigation I found that
HKEY_CURRENT_USER\Software\Mindjet\MindManager\14\Settings lost it's security inheritance from the parent key for unknown reason. I re-enabled inheritace and re-started the application. The problem is no longer present. I hope this helps others in similar situation.