Dorico Pro 3 crashes often

Hi Graham, first of all, the logs tell me that you are still on Dorico 3.0.0 but there is already a 3.0.10 with bug fixes out. So I propose that you first upgrade and see how that goes.
Also, the diagnostics report does not contain any crash dump file. So please refer to following thread for the dump-config (you need to scroll down a bit):