Hi Kovid,
I tried to start the content server via the "Start Server" button and received this error in a pop up window (see attachment). I then tried setting "load on startup" and exited caibre only to find I couldn't get back in

. Fortunately I found the config file setting and reverted the server setting:
autolaunch_server = False
Can't wait to take this server for a spin!
Cheers,
Crazy