Sorry for all the post, but to those of you that have jumped to newer versions earlier, I now feel your pain.
Alt-W used to jump you to a command where you could choose another window.
I realize now that there is the search bar for commands where you can type in the old command and it will give you the new command. When typing in "Alt-W", it returns nothing. How do you switch between windows?
(It's going to be a long day!)
It's supposed to be like windows programs. So if you hit ALT-F, that's the file tab, then if you look at the drop downs or the icons, it shows a letter by each one indicating the key to get to that command.
Push and let go of the ALT key and it shows you what is available. That's what I did in the image above, I should have mentioned that. It'll be some different for you based on your toolbar.