Thank you for the reply.
Yes, it does appear to be file operations in general as it affects the File Open common dialog as well. I had a look in the “application.logxx” files and the last entry in each case was : “Executing command: File.Open” or “…File.SaveAs”.
Unfortunately, Cubase started misbehaving immediately after I installed Dorico. I had been using it shortly before the installation of Dorico and it was working correctly. After Dorico was installed, the Yamaha ASIO driver disappeared from Cubase and it reported “Missing Ports”. Reinstalling the driver fixed the issue until I ran Dorico again and Cubase again became corrupted.
Apart from the file dialog issues, Dorico seemed to be working correctly and “Play” was talking to my UR22.
Ultimately, I became nervous and uninstalled Dorico and repaired Cubase again. It appears to be OK at the moment.
I’m a little reluctant to reinstall it given the behaviour I’ve experienced. I do have a laptop running the same version of Windows that I’d be happy to “sacrifice” as a comparison. If I remove the trial licence from my soft eLicenser, will I be able to install the trial on the laptop using the same Activation code?
Should it work correctly on the laptop, then, I can make sure that Cubase is really working correctly (ie reinstalling the Yamaha driver is all that is required to repair it). Then I’d be prepared to reinstall Dorico on my desktop and carry out the diagnostics you have requested.
I’ll need your advice on moving the trial licence between machines if that is possible.
Thanks again for your help.