As it happens I am making a lot of changes at the moment to simplify and de-clutter the user interface, as part of that I have removed the old manual measurement features and I have allowed the app to work with the operating system's default soundcard selections as well as whatever manual selections the user might make (Bruce: don't go too far with a user guide as the new version will render much of it in need of a rewrite).
I'm currently completing a revised dialog to handle the level settings, once I've got that done I'll make a beta version for the mods to do some trials with. I may post a screen shot of the state so far as a little teaser
but I'm away from home at the moment, will be back tonight but then I'm away on business until Thursday. The day job keeps me pretty busy, but REW gets the lion's share of my remaining time. I think the new version will have plenty to satisfy both the users wanting a simpler life and the more in-depth users wanting more features, but time will tell.