So I am running version 0.5.5
On my keyboard, I have one of those lovely Sleep buttons.
Started a 20 minute job , put the keyboard down and hit the sleep button.
Eventually got the PC back logged in and the Application was still running. however, the Pause Job and Stop where Enabled but un-responsive.
I had to close out the application, I also lost functionality of the Z probe, its a separate issue, but I am mentioning it here.