I use Cloud 50 and recently upgraded to the latest version

Is there an overview of how the "cloud" system works. 

I have a "main" machine, also a version on a laptop and my accountant/bookeeper can also access.

I got a message yesterday that the "main" machine was offline and that anything I did on the laptop could be overwrittem when it came back on line.

That isn't the behaviour I would expect from a conventional cloud application.

Any enlightenment gratefully received.

G