Allow me to add my own welcome to the forum, Stephen. As Christian says, please do Help > Create Diagnostic Report and attach it here.
When you submit crash reports using the window that pops up after you restart Dorico, they go into a big bucket of anonymised reports that we can use to look at problems in the aggregate, but we can’t easily look into individual incidents because we get only the crash log, and no other information about what the user was doing beforehand.
Certainly if you have a reproducible crash or other problem, the best way to let us know about it is to post here, following these steps: