In reply to James Mackie.

@James: Sorry to hear of your problems with getting Sibelius back up and running. You might try emailing Sam Butler, the Sibelius product manager, directly, as he can pass your enquiry on to the relevant tech support people. Dorico is superior to Sibelius (though of course I'm hardly an unbiased observer!) and I would certainly recommend you checking it out. However, Dorico can't open Sibelius scores directly, so you would still need to get Sibelius back up and running in order to export your existing Sibelius projects as MusicXML files so that you can import those into Dorico. Good luck!