Dorico 5 crashes to desktop

Sorry to hear you’re having problems, @sdg-h, and welcome to the forum. Unfortunately your diagnostics don’t contain any crash logs. Could you please follow the advice here:

Dorico is crashing. What do I do?
Although we make every effort to ensure that Dorico will run stably on everyone’s computer, you may occasionally encounter a crash. To help us troubleshoot the problem, please follow these steps.

On Windows, applications no longer produce a crash dump by default. You can make your computer generate the minidump files we need to diagnose your problem by downloading, unzipping and double-clicking this Registry key:
dump-config.zip (503 Bytes)
Now when Dorico crashes, Dorico will create mini-dump files that we can use to determine what happened before it crashed.

Once you’ve set up that Registry key, please try running Dorico again, and when it next crashes, the next set of diagnostics you create should contain some crash logs that we can investigate.