Dorico Crashing in last 2 weeks

Unfortunately, there are no crash logs in your diagnostics, @JonnoRAS. Please follow the steps in the FAQ thread 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.

This will ensure your computer creates crash logs when Dorico crashes. Then you should be able to reproduce the problem again, and generate a new set of diagnostics so we can take a look.