When you click Window in menu bar it only gives you nine open patterns (first nine you have opened during your "session"). I understand that most people don't have dozen sketches on the go on the same time, and I can browse with the arrows so it's not that much of a bother, but I'd love to be able to really choose quickly the design I want to work on instead of browsing with the arrows.
So, if you ever develop nice feature which makes possible to have the actual amount of currently open windows you'd have at least one extremely thrilled user (not that I wasn't one already).
'Life is a great big canvas; throw all the paint on it you can.' -- Danny Kaye
I rarely have more than one or two open at one time. My PC's memory won't do much more! PCStitch is about the 3rd or 4th largest program I use (behind Word, Excel and maybe Foxit or Adobe). The one window problem I've seen and it's been there since Pro was released - if you're in max-screen mode (my normal operating procedure) and use the window command, it's always one short! It never lists ALL the windows open. However, if you switch to window mode, you do get all of them.
I do agree, though that the ability to window is great. It allows you to copy between several patterns much easier and compare two patterns.