All I did was launch KeePass just after login to the PC.
Somehow KeePass finally loaded later on in my session.
ERROR! Please click on this box, press CTRL-C on your keyboard and paste into a new post on the KeeFox forum (http://keefox.org/help/forum). Doing this will help other people to use KeeFox without any unexpected error messages like this. Please briefly describe what you were doing when the problem occurred, which version of KeeFox, KeePass and Firefox you use and what other security software you run on your machine. Thanks! Technical detail follows: System.NullReferenceException: Object reference not set to an instance of an object.
at KeePassRPC.KeePassRPCClientConnection.Encrypt(String plaintext)