Something you might or might not be aware of: v6 is a ground-up rewrite, using completely different technology, language, etc. It’s now .Net, when it used to be native Delphi.
I think this is a mistake. v4 was a great app. Simple, fast, worked well. Much of that is because of the tech that was used — Delphi is lean, native, clean. One reason features are missing is probably because they’ve gone for the rewrite option, something that most software professionals never choose to do. This is a very famous article on it: https://www.joelonsoftware.com/2000/04/06/things-you-should-never-do-part-i/
I’d rather like to see them open source the old client.