I know the solution - it happens the same to me
Quit Evernote for Mac
find the file ene-current-user inside Evernote Folder in your User Library ( /Users/__your__name__/Library/Group\ Containers/__SOMELETTERS__.com.evernote.Evernote )
open edit with a text editor ( VI from the terminal or Bbedit ), and change one value in the XML file - search for the key ENAccountInfoIsPremium and change it to true
save the file
open Evernote !
it's clearly a bug in the app BTW… since every exchange with the web server clearly ( as per the log ) show it "knows" the account is premium but failed to update the above file