thanks for trying to help but, as I mentioned in my post, it's not one of the more common, better known add-ons such as retroui, sart8, modernmix, classic shell, pokki, or the others mentioned in the article i linked to (9 windows start menus for windows 8). frankly, i can't believe i can't find it, it's driving me nuts - part of the problem is that modernmix and a few others dominate searches given their popularity, i.e. if you search for "open modern apps in a window" good luck finding much more than references to modernmix.