I just installed Dropbox after few years because I need to sync some folders. The new application is terrible! It took me a long time to find the selective sync options, instead it's showing me some features that I am not interested in at all.
My biggest complaint of the new dropbox app (for Windows) is that every other day the tray icon routinely pops up alerts (or warning badges over the icon) that look alarming. But they're just ads for other Dropbox features. I already pay for it — stop pretending my non-use of Paper is an "alert" worth interrupting me for. If you can't sync my folders, yes, alert me! Otherwise, shut up and do your job (sync my folders).