It´s much more simple that that.
Before this new version, you could access to see all your notes folders using the tab folders and you would see something like "browse all your folders" in the upper right corner of the folders list. Then if you wanted to access a folder you could select it, access it and bring it to your current folder list inside your Evernote app. That have disapeared. That´s what I mean.
An alternative solution was going to the admin console (web), search for a folder, publish it, share it with some user... whatever. That´s the approach I had to use after upgrading my Evernote app. It´s ok, no problem... but now I have the desired folders back in my app with ZERO notes inside some of them and all the right notes inside some other folders, which means no good sync. I see them all perfectly using Evernote Legacy, thou. That´s the reason of my complain: why the hell a newer version is way worst than it´s predecesor??? This is nonsense.