Is there a way to select all text in all documents in one go, so that the Edit/Transformations menu can be applied to all documents? Having to select each document individually is a bit cumbersome when you have a lot of documents in your project.
I don’t think so. On the Mac, you’d click on the top-level folder in scrivenings mode, then ⌘A, but ctrl-A only selects one document at a time in Windows. There are other ways to change quotes from straight to curly, if that’s what you need.