No output registering on Dorico 3

Hi there,
I’ve just downloaded Dorico 3 Educational Crossgrade from Sibelius. I’m ready to get going but for some reason no audio is working on either playback or input modes. I’ve never used Dorico before but looking at the set-up it appears that no output is being detected - not even the internal speakers (I’ve not got any external connections, so this seems strange).
Screen shot attached.
Any ideas?

In the Device Setup dialog, click on ‘Device Control Panel’, a new little window will appear.
In that window is at the top an option called “Allow ASIO host applications exclusive…”.
Toggle that option, do then in the middle of that window output ports appear?