After upgrading a 9.9.12 installation to 10.0.0, I now get three pop-ups when I start the client:
"A message from Server was not understood. Please consider upgrading the Client."
This is sometimes followed by another pop-up:
"Unable to save Servers file, error: The process cannot access the file 'C:\Users\mromer\AppData\Local\VisualCron\settings\servers.xml' because it is being used by another process."
My client is connected to five servers. All except for my local one are still v. 9.9.12.
Everything seems to work OK, otherwise.