Parts have all instruments

I know that this has been mentioned a couple of times before. But I’m in a place where, in every project, every player has every other player’s music in their part. Not sure how to get out of this on my Mac.

You can fix individual parts using the checkboxes in Setup mode, of course, but to stop this happening again (and with apologies that it happened in the first place), delete the files whose names start with layoutOptions and end in .xml in ~/Library/Application Support/Steinberg/Dorico.

Thank You for the Help.

Done use custom layouts until the bug is fixed.