If anyone else has this happen to them, make sure that you back up all your recent notes in the Evernote folder of the Remember app before reauthorizing. As in, copy and paste the contents of each note elsewhere. Once you reauthorize Evernote, everything in that folder will be replaced by the latest synced version of each note and all changes you made since the authentication expired will be disregarded. Nothing will be saved in the "Conflicting Changes" notebook either.
Anyway, the Evernote integration in the Remember app from BlackBerry 10 still works fine. It looks like nothing changed